mozilla err: actions not found

[robert.butora@hut.fi]

Hi,

I installed mozilla navigator without
error messages.
After I start to run I'm getting

Warning: Actions not found: BtnUp, BtnDown
XFE_ToolbarItem::setBaseWidget(urlBar)

However from menu OpenPage I can
succesfully browse but sometimes
clicking on some menus mozilla goes down
with segmentation fault.

Is it mozilla problem ?

If it is some X library problem why
installation script doesn't report
incompatibility ?

Thanks for any indication 
on which libraries should I check
(they are just too many)

Robert