Opera crashes on exit

[Erratus]

When closing opera browser in fluxbox it says bye with a request for sending an error report.
Doing the same in KDE4 stops opera with no strings attached.
> grep opera .fluxbox/menu
[exec] (opera) {opera}

Hmm, any ideas what might be the reason?

[Beastie]

Opera 10.6x? I guess it is autodetecting the Qt libraries loaded by KDE. But when you run it under Fluxbox it gets "confused". Try changing the toolkit settings (http://chakra-project.org/bbs/viewtopic.php?pid=20316). Note that, if I am not mistaken, 1 = QT does not exist.

[Erratus]

opera:config#FileSelector|Dialogtoolkit
was set to 0

Options are

0 = automatic
1 = QT
2 = GTK
3 = KDE4
4 = x11

Having set to 4 and problem is solved.