I experienced the same symptoms when trying to use unison-gtk.
Attempting to create a new profile with its wizard resulted in a crash and the same messages as in the original report when attempting to select source and target directories.
After uninstalling the qtcurve packages everything worked fine. -- Jed Frechette -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org