xlibs dependency problems

I'm having problems with xlibs and muesli's KDE debs.

kdelibs4 depends on xlibs 4.3 (from experimental I presume).

But libqt3-mt-dev from unstable depends on xlibs 4.2.1.

Which xlibs should I use or am I using the wrong qt package?

Thanks for any help

Jonathan Riddell