Are you running KDE nightlies? I had this error because the nightly KDE messed up my Qt config. To fix this, you need to (re)move your Trolltech.conf file so a new one can be built, like the KDE bug report says:
$ mv ~/.config/Trolltech.conf ~/Desktop/Trolltech-broken.conf Then run your Qt application. If you want to see what happened: $ diff ~/Desktop/Trolltech-broken.conf ~/.config/Trolltech.conf -- Firefox cannot start: Cannot mix incompatible Qt libraries https://bugs.launchpad.net/bugs/298601 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
