I wonder if someone better than I am at this can find the clue in this
big, ugly qt blockage? Seems like sometimes possibly it's complaining
about qt-4.5 vs qt-4.4 while other times it's complaining about 4.5.1
vs 4.5.1.

Sometimes it says
[blocks b     ] >

while other times it says
[blocks b     ] <

Anyway, I'm not interested in being a hero and going wrong so I
figured I'd ask what's the one important clue here that tells me what
the root cause problem is?

Cheers,
Mark

lightning ~ # emerge -DuN @system
Calculating dependencies... done!
[ebuild  N    ] x11-libs/libXfontcache-1.0.4  USE="-debug"
[ebuild  N    ] x11-apps/xset-1.0.4  USE="-debug"
[ebuild     U ] x11-libs/qt-core-4.5.1 [4.4.2-r2]
[ebuild     U ] x11-libs/qt-dbus-4.5.1 [4.4.2]
[ebuild     U ] x11-libs/qt-script-4.5.1 [4.4.2] USE="iconv%*"
[ebuild     U ] x11-libs/qt-gui-4.5.1 [4.4.2-r3] USE="gtkstyle%* -raster%"
[ebuild     U ] x11-libs/qt-svg-4.5.1-r1 [4.4.2] USE="iconv%*"
[blocks b     ] <x11-libs/qt-svg-4.5.1 ("<x11-libs/qt-svg-4.5.1" is
blocking x11-libs/qt-opengl-4.5.1, x11-libs/qt-script-4.5.1,
x11-libs/qt-dbus-4.5.1, x11-libs/qt-gui-4.5.1,
x11-libs/qt-qt3support-4.5.1, x11-libs/qt-sql-4.5.1,
x11-libs/qt-core-4.5.1)
[blocks b     ] >x11-libs/qt-opengl-4.4.2-r9999
(">x11-libs/qt-opengl-4.4.2-r9999" is blocking
x11-libs/qt-script-4.4.2, x11-libs/qt-dbus-4.4.2,
x11-libs/qt-gui-4.4.2-r3, x11-libs/qt-sql-4.4.2-r1,
x11-libs/qt-qt3support-4.4.2, x11-libs/qt-svg-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-core-4.4.2-r2)
[ebuild     U ] x11-libs/qt-opengl-4.5.1 [4.4.2]
[blocks b     ] >x11-libs/qt-gui-4.4.2-r9999
(">x11-libs/qt-gui-4.4.2-r9999" is blocking x11-libs/qt-script-4.4.2,
x11-libs/qt-dbus-4.4.2, x11-libs/qt-sql-4.4.2-r1,
x11-libs/qt-qt3support-4.4.2, x11-libs/qt-svg-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-opengl-4.4.2,
x11-libs/qt-core-4.4.2-r2)
[blocks b     ] >x11-libs/qt-sql-4.4.2-r9999
(">x11-libs/qt-sql-4.4.2-r9999" is blocking x11-libs/qt-script-4.4.2,
x11-libs/qt-dbus-4.4.2, x11-libs/qt-gui-4.4.2-r3,
x11-libs/qt-qt3support-4.4.2, x11-libs/qt-svg-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-opengl-4.4.2,
x11-libs/qt-core-4.4.2-r2)
[blocks b     ] >x11-libs/qt-core-4.4.2-r9999
(">x11-libs/qt-core-4.4.2-r9999" is blocking x11-libs/qt-script-4.4.2,
x11-libs/qt-dbus-4.4.2, x11-libs/qt-gui-4.4.2-r3,
x11-libs/qt-sql-4.4.2-r1, x11-libs/qt-qt3support-4.4.2,
x11-libs/qt-svg-4.4.2, x11-libs/qt-test-4.4.2,
x11-libs/qt-opengl-4.4.2)
[blocks b     ] >x11-libs/qt-svg-4.4.2-r9999
(">x11-libs/qt-svg-4.4.2-r9999" is blocking x11-libs/qt-script-4.4.2,
x11-libs/qt-dbus-4.4.2, x11-libs/qt-gui-4.4.2-r3,
x11-libs/qt-sql-4.4.2-r1, x11-libs/qt-qt3support-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-opengl-4.4.2,
x11-libs/qt-core-4.4.2-r2)
[blocks b     ] >x11-libs/qt-qt3support-4.4.2-r9999
(">x11-libs/qt-qt3support-4.4.2-r9999" is blocking
x11-libs/qt-script-4.4.2, x11-libs/qt-dbus-4.4.2,
x11-libs/qt-gui-4.4.2-r3, x11-libs/qt-sql-4.4.2-r1,
x11-libs/qt-svg-4.4.2, x11-libs/qt-test-4.4.2,
x11-libs/qt-opengl-4.4.2, x11-libs/qt-core-4.4.2-r2)
[blocks b     ] <x11-libs/qt-opengl-4.5.1 ("<x11-libs/qt-opengl-4.5.1"
is blocking x11-libs/qt-svg-4.5.1-r1, x11-libs/qt-script-4.5.1,
x11-libs/qt-dbus-4.5.1, x11-libs/qt-gui-4.5.1,
x11-libs/qt-qt3support-4.5.1, x11-libs/qt-sql-4.5.1,
x11-libs/qt-core-4.5.1)
[blocks b     ] >x11-libs/qt-dbus-4.4.2-r9999
(">x11-libs/qt-dbus-4.4.2-r9999" is blocking x11-libs/qt-script-4.4.2,
x11-libs/qt-gui-4.4.2-r3, x11-libs/qt-sql-4.4.2-r1,
x11-libs/qt-qt3support-4.4.2, x11-libs/qt-svg-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-opengl-4.4.2,
x11-libs/qt-core-4.4.2-r2)
[blocks b     ] >x11-libs/qt-script-4.4.2-r9999
(">x11-libs/qt-script-4.4.2-r9999" is blocking x11-libs/qt-dbus-4.4.2,
x11-libs/qt-gui-4.4.2-r3, x11-libs/qt-sql-4.4.2-r1,
x11-libs/qt-qt3support-4.4.2, x11-libs/qt-svg-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-opengl-4.4.2,
x11-libs/qt-core-4.4.2-r2)
[ebuild     U ] x11-misc/shared-mime-info-0.60 [0.51]
[ebuild     U ] x11-misc/xdg-utils-1.0.2-r3 [1.0.2-r1]
[ebuild     U ] x11-libs/qt-sql-4.5.1 [4.4.2-r1]
[ebuild     U ] x11-libs/qt-qt3support-4.5.1 [4.4.2] USE="kde%* -phonon%"
[blocks B     ] <x11-libs/qt-gui-4.5.1 ("<x11-libs/qt-gui-4.5.1" is
blocking x11-libs/qt-opengl-4.5.1, x11-libs/qt-svg-4.5.1-r1,
x11-libs/qt-script-4.5.1, x11-libs/qt-dbus-4.5.1,
x11-libs/qt-qt3support-4.5.1, x11-libs/qt-sql-4.5.1,
x11-libs/qt-core-4.5.1)
[blocks B     ] >x11-libs/qt-gui-4.4.2-r9999
(">x11-libs/qt-gui-4.4.2-r9999" is blocking x11-libs/qt-script-4.4.2,
x11-libs/qt-dbus-4.4.2, x11-libs/qt-sql-4.4.2-r1,
x11-libs/qt-qt3support-4.4.2, x11-libs/qt-svg-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-opengl-4.4.2,
x11-libs/qt-core-4.4.2-r2)
[blocks B     ] >x11-libs/qt-sql-4.4.2-r9999
(">x11-libs/qt-sql-4.4.2-r9999" is blocking x11-libs/qt-script-4.4.2,
x11-libs/qt-dbus-4.4.2, x11-libs/qt-gui-4.4.2-r3,
x11-libs/qt-qt3support-4.4.2, x11-libs/qt-svg-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-opengl-4.4.2,
x11-libs/qt-core-4.4.2-r2)
[blocks B     ] >x11-libs/qt-opengl-4.4.2-r9999
(">x11-libs/qt-opengl-4.4.2-r9999" is blocking
x11-libs/qt-script-4.4.2, x11-libs/qt-dbus-4.4.2,
x11-libs/qt-gui-4.4.2-r3, x11-libs/qt-sql-4.4.2-r1,
x11-libs/qt-qt3support-4.4.2, x11-libs/qt-svg-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-core-4.4.2-r2)
[blocks B     ] >x11-libs/qt-core-4.4.2-r9999
(">x11-libs/qt-core-4.4.2-r9999" is blocking x11-libs/qt-script-4.4.2,
x11-libs/qt-dbus-4.4.2, x11-libs/qt-gui-4.4.2-r3,
x11-libs/qt-sql-4.4.2-r1, x11-libs/qt-qt3support-4.4.2,
x11-libs/qt-svg-4.4.2, x11-libs/qt-test-4.4.2,
x11-libs/qt-opengl-4.4.2)
[blocks B     ] <x11-libs/qt-script-4.5.1 ("<x11-libs/qt-script-4.5.1"
is blocking x11-libs/qt-opengl-4.5.1, x11-libs/qt-svg-4.5.1-r1,
x11-libs/qt-dbus-4.5.1, x11-libs/qt-gui-4.5.1,
x11-libs/qt-qt3support-4.5.1, x11-libs/qt-sql-4.5.1,
x11-libs/qt-core-4.5.1)
[blocks B     ] >x11-libs/qt-qt3support-4.4.2-r9999
(">x11-libs/qt-qt3support-4.4.2-r9999" is blocking
x11-libs/qt-script-4.4.2, x11-libs/qt-dbus-4.4.2,
x11-libs/qt-gui-4.4.2-r3, x11-libs/qt-sql-4.4.2-r1,
x11-libs/qt-svg-4.4.2, x11-libs/qt-test-4.4.2,
x11-libs/qt-opengl-4.4.2, x11-libs/qt-core-4.4.2-r2)
[blocks B     ] <x11-libs/qt-test-4.5.1 ("<x11-libs/qt-test-4.5.1" is
blocking x11-libs/qt-opengl-4.5.1, x11-libs/qt-svg-4.5.1-r1,
x11-libs/qt-script-4.5.1, x11-libs/qt-dbus-4.5.1,
x11-libs/qt-gui-4.5.1, x11-libs/qt-qt3support-4.5.1,
x11-libs/qt-sql-4.5.1, x11-libs/qt-core-4.5.1)
[blocks B     ] <x11-libs/qt-qt3support-4.5.1
("<x11-libs/qt-qt3support-4.5.1" is blocking x11-libs/qt-opengl-4.5.1,
x11-libs/qt-svg-4.5.1-r1, x11-libs/qt-script-4.5.1,
x11-libs/qt-dbus-4.5.1, x11-libs/qt-gui-4.5.1, x11-libs/qt-sql-4.5.1,
x11-libs/qt-core-4.5.1)
[blocks B     ] <x11-libs/qt-dbus-4.5.1 ("<x11-libs/qt-dbus-4.5.1" is
blocking x11-libs/qt-opengl-4.5.1, x11-libs/qt-svg-4.5.1-r1,
x11-libs/qt-script-4.5.1, x11-libs/qt-gui-4.5.1,
x11-libs/qt-qt3support-4.5.1, x11-libs/qt-sql-4.5.1,
x11-libs/qt-core-4.5.1)
[blocks B     ] <x11-libs/qt-core-4.5.1 ("<x11-libs/qt-core-4.5.1" is
blocking x11-libs/qt-opengl-4.5.1, x11-libs/qt-svg-4.5.1-r1,
x11-libs/qt-script-4.5.1, x11-libs/qt-dbus-4.5.1,
x11-libs/qt-gui-4.5.1, x11-libs/qt-qt3support-4.5.1,
x11-libs/qt-sql-4.5.1)
[blocks B     ] <x11-libs/qt-sql-4.5.1 ("<x11-libs/qt-sql-4.5.1" is
blocking x11-libs/qt-opengl-4.5.1, x11-libs/qt-svg-4.5.1-r1,
x11-libs/qt-script-4.5.1, x11-libs/qt-dbus-4.5.1,
x11-libs/qt-gui-4.5.1, x11-libs/qt-qt3support-4.5.1,
x11-libs/qt-core-4.5.1)
[blocks B     ] >x11-libs/qt-dbus-4.4.2-r9999
(">x11-libs/qt-dbus-4.4.2-r9999" is blocking x11-libs/qt-script-4.4.2,
x11-libs/qt-gui-4.4.2-r3, x11-libs/qt-sql-4.4.2-r1,
x11-libs/qt-qt3support-4.4.2, x11-libs/qt-svg-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-opengl-4.4.2,
x11-libs/qt-core-4.4.2-r2)
[blocks B     ] >x11-libs/qt-svg-4.4.2-r9999
(">x11-libs/qt-svg-4.4.2-r9999" is blocking x11-libs/qt-script-4.4.2,
x11-libs/qt-dbus-4.4.2, x11-libs/qt-gui-4.4.2-r3,
x11-libs/qt-sql-4.4.2-r1, x11-libs/qt-qt3support-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-opengl-4.4.2,
x11-libs/qt-core-4.4.2-r2)
[blocks B     ] >x11-libs/qt-script-4.4.2-r9999
(">x11-libs/qt-script-4.4.2-r9999" is blocking x11-libs/qt-dbus-4.4.2,
x11-libs/qt-gui-4.4.2-r3, x11-libs/qt-sql-4.4.2-r1,
x11-libs/qt-qt3support-4.4.2, x11-libs/qt-svg-4.4.2,
x11-libs/qt-test-4.4.2, x11-libs/qt-opengl-4.4.2,
x11-libs/qt-core-4.4.2-r2)

 * Error: The above package list contains packages which cannot be
 * installed at the same time on the same system.

  ('ebuild', '/', 'x11-libs/qt-gui-4.5.1', 'merge') pulled in by
    x11-libs/qt-gui:4 required by ('installed', '/',
'media-sound/qjackctl-0.3.3', 'nomerge')
    >=x11-libs/qt-gui-4.4.2:4 required by ('installed', '/',
'dev-python/PyQt4-4.4.4-r2', 'nomerge')
    x11-libs/qt-gui:4 required by ('installed', '/',
'app-text/poppler-bindings-0.10.5-r1', 'nomerge')
    (and 6 more)

  ('ebuild', '/', 'x11-libs/qt-qt3support-4.5.1', 'merge') pulled in by
    ~x11-libs/qt-qt3support-4.5.1[-debug] required by ('ebuild', '/',
'x11-libs/qt-gui-4.5.1', 'merge')
    >=x11-libs/qt-qt3support-4.4.2:4 required by ('installed', '/',
'dev-python/PyQt4-4.4.4-r2', 'nomerge')

  ('ebuild', '/', 'x11-libs/qt-svg-4.5.1-r1', 'merge') pulled in by
    >=x11-libs/qt-svg-4.4.2:4 required by ('installed', '/',
'dev-python/PyQt4-4.4.4-r2', 'nomerge')

  ('ebuild', '/', 'x11-libs/qt-dbus-4.5.1', 'merge') pulled in by
    ~x11-libs/qt-dbus-4.5.1[-debug] required by ('ebuild', '/',
'x11-libs/qt-gui-4.5.1', 'merge')
    >=x11-libs/qt-dbus-4.4.2:4 required by ('installed', '/',
'dev-python/PyQt4-4.4.4-r2', 'nomerge')

  ('installed', '/', 'x11-libs/qt-core-4.4.2-r2', 'nomerge') pulled in by
    ~x11-libs/qt-core-4.4.2 required by ('installed', '/',
'x11-libs/qt-script-4.4.2', 'nomerge')
    x11-libs/qt-core:4 required by ('installed', '/',
'media-sound/qjackctl-0.3.3', 'nomerge')
    x11-libs/qt-core required by ('installed', '/',
'media-video/vlc-0.9.8a', 'nomerge')
    (and 7 more)

  ('installed', '/', 'x11-libs/qt-dbus-4.4.2', 'nomerge') pulled in by
    >=x11-libs/qt-dbus-4.4.2:4 required by ('installed', '/',
'dev-python/PyQt4-4.4.4-r2', 'nomerge')
    ~x11-libs/qt-dbus-4.4.2 required by ('installed', '/',
'x11-libs/qt-gui-4.4.2-r3', 'nomerge')

  ('installed', '/', 'x11-libs/qt-qt3support-4.4.2', 'nomerge') pulled in by
    ~x11-libs/qt-qt3support-4.4.2 required by ('installed', '/',
'x11-libs/qt-gui-4.4.2-r3', 'nomerge')
    >=x11-libs/qt-qt3support-4.4.2:4 required by ('installed', '/',
'dev-python/PyQt4-4.4.4-r2', 'nomerge')

  ('installed', '/', 'x11-libs/qt-gui-4.4.2-r3', 'nomerge') pulled in by
    x11-libs/qt-gui:4 required by ('installed', '/',
'media-sound/qjackctl-0.3.3', 'nomerge')
    >=x11-libs/qt-gui-4.4.2:4 required by ('installed', '/',
'dev-python/PyQt4-4.4.4-r2', 'nomerge')
    x11-libs/qt-gui required by ('installed', '/',
'media-video/vlc-0.9.8a', 'nomerge')
    (and 4 more)

  ('ebuild', '/', 'x11-libs/qt-core-4.5.1', 'merge') pulled in by
    x11-libs/qt-core:4 required by ('installed', '/',
'media-sound/qjackctl-0.3.3', 'nomerge')
    ~x11-libs/qt-core-4.5.1[-debug] required by ('ebuild', '/',
'x11-libs/qt-script-4.5.1', 'merge')
    ~x11-libs/qt-core-4.5.1[qt3support,-debug] required by ('ebuild',
'/', 'x11-libs/qt-sql-4.5.1', 'merge')
    (and 7 more)

  ('installed', '/', 'x11-libs/qt-test-4.4.2', 'nomerge') pulled in by
    x11-libs/qt-test:4 required by ('installed', '/',
'app-text/poppler-bindings-0.10.5-r1', 'nomerge')

  ('ebuild', '/', 'x11-libs/qt-opengl-4.5.1', 'merge') pulled in by
    >=x11-libs/qt-opengl-4.4.2:4 required by ('installed', '/',
'dev-python/PyQt4-4.4.4-r2', 'nomerge')


For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):

http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?full=1#blocked

lightning ~ #

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