$ apt-file -a i386 search libQtCore.so libqt4-dbg: /usr/lib/debug/usr/lib/i386-linux-gnu/libQtCore.so.4.7.4 libqt4-dev: /usr/lib/i386-linux-gnu/libQtCore.so libqtcore4: /usr/lib/i386-linux-gnu/libQtCore.so.4 libqtcore4: /usr/lib/i386-linux-gnu/libQtCore.so.4.7 libqtcore4: /usr/lib/i386-linux-gnu/libQtCore.so.4.7.4
i think this happens for the mayority of libqt* packages all the symlinks are on libqt4-dev instead of every particular package
$ apt-file -a i386 search libQtCore.so debug/usr/ lib/i386- linux-gnu/ libQtCore. so.4.7. 4 i386-linux- gnu/libQtCore. so i386-linux- gnu/libQtCore. so.4 i386-linux- gnu/libQtCore. so.4.7 i386-linux- gnu/libQtCore. so.4.7. 4
libqt4-dbg: /usr/lib/
libqt4-dev: /usr/lib/
libqtcore4: /usr/lib/
libqtcore4: /usr/lib/
libqtcore4: /usr/lib/
i think this happens for the mayority of libqt* packages
all the symlinks are on libqt4-dev instead of every particular package