i just had a closer look, it always fail on libqt4-dev-dbgsym, which looks strange in my cache (the Section part), confirmed in http://ddebs.ubuntu.com/dists/natty/main/binary-i386/Packages
# apt-cache show libqt4-dev-dbgsym Package: libqt4-dev-dbgsym Priority: extra Section: libdevel libqt4-svg (= 4:4.7.1-0ubuntu4), libqt4-xml (= 4:4.7.1-0ubuntu4), libqt4-sql (= 4:4.7.1-0ubuntu4), libqt4-script (= 4:4.7.1-0ubuntu4), libqt4-scripttools (= 4:4.7.1-0ubuntu4), libqt4-xmlpatterns (= 4:4.7.1-0ubuntu4), libqt4-qt3support (= 4:4.7.1-0ubuntu4), libqt4-designer (= 4:4.7.1-0ubuntu4), libqt4-help (= 4:4.7.1-0ubuntu4), libqt4-test (= 4:4.7.1-0ubuntu4), libqt4-declarative (= 4:4.7.1-0ubuntu4), qt4-qmake (= 4:4.7.1-0ubuntu4), libx11-dev Installed-Size: 63668 Maintainer: Kubuntu Developers <kubuntu-de...@lists.ubuntu.com> Original-Maintainer: Debian Qt/KDE Maintainers <debian-qt-...@lists.debian.org> Architecture: amd64 Source: qt4-x11 Version: 4:4.7.1-0ubuntu4 Depends: libqt4-dev (= 4:4.7.1-0ubuntu4) Conflicts: libqt4-dbg, libqt4-webkit-dbg, libqt4-xmlpatterns-dbg, qt4-demos-dbg Filename: pool/main/q/qt4-x11/libqt4-dev-dbgsym_4.7.1-0ubuntu4_amd64.ddeb Size: 18516782 MD5sum: 8f73a69762ec51bcbbfbf8a0d239d5e9 SHA1: ba2c6ecd4b6cbbb511a44af2010675a961eeb106 SHA256: 16b123dbc292412768f47cbb7d8d23d392718bdbde24e5c80160919919c6aba7 Description: debug symbols for package libqt4-dev Qt is a cross-platform C++ application framework. Qt's primary feature is its rich set of widgets that provide standard GUI functionality. . This package contains the header development files and development programs used for building Qt 4 applications. Homepage: http://www.qtsoftware.com -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/669430 Title: update-apt-xapian-index crashes with "InvalidArgumentError: Term too long (> 245): XSlibdevel" -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs