libqwt5-qt4 installs its libraries in /usr/lib so it can't be marked as Multi-Arch: same.
qwt5 builds fine against Qt 4.8 so no changes are immediately necessary. Qt has a compatibility patch so it loads plugins from /usr/lib/qt4 and /usr/lib/<arch>/qt4. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org