Delete these files with fileboxroot:

var/lib/dpkg/inf/

- libqt-facebook.digsigsums
- libqt-facebook.list
- libqt-facebook.md5sums
- libqt-facebook.postinst
- libqt-facebookbqt-postrm
- libqt-facebook.shlibs


should disappear when you run QQ -1-2 all app ?