Try to uninstall kgtk-qt3-trinity (and maybe
gtk-qt-engine-trinity); see okd mail from Slávek:
------------------------- snip ------------------------------------------
On Wednesday 02 May 2012, Slávek Banko wrote:
Problems with crashes GTK programs I have seen
only if I had installed
kgtk-qt3-trinity (and related), which replacing dialog boxes. But with
gtk-qt-engine-trinity, which only changes the appearance of gui widgets,
it does not fall.
Note: These problems apparently not related to the update 3.5.13.1.
Slavek
Question: when will get kgtk-qt3-trinity not longer installed by sefault - too much
trouble with gtk applications. I wasn't able to use
* lazarus-ide
* dropbox
* calibre
without using using sudo before I uninstalled the culprit.
Gerhard
Yes I recommend too to remove these theme engine package. On PCLinuxOS, it worked partly,
but caused enormous document layout troubles... Better stay away! Instead, you can get a
GTK theme that is similar to Plastik.
-Alexandre