> 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