Mozilla crush!

[Michael Stepanov <f.l.linux-admin@news.francoudi.com>]

Hi!

I have problems with mozilla and MozillaFirebird. Both crush 
periodically with messages:

1) mozilla -

Warning: Cannot convert string "6x13*font:         6x13*font: 6x13*font: 
         6x13*font:" to type FontStruct

Warning: Actions not found: addBookmark, viewBookmark, copy, 
undefined-key, find, findAgain, history, loadImages, openURL, mailNew, 
new, openFile, print, exit, reload, saveAs, paste, delete, cut, undo, 
historyItem, back, forward, abort, PageUp, PageDown

Warning: Actions not found: ManagerGadgetNextTabGroup, 
ManagerGadgetPrevTabGroup, DrawingAreaInput, addBookmark, viewBookmark, 
copy, undefined-key, find, findAgain, history, loadImages, openURL, 
mailNew, new, openFile, print, exit, reload, saveAs, paste, delete, cut, 
undo, historyItem, back, forward, abort, PageUp, PageDown

Warning: No action proc named "ManagerGadgetArm" is registered for 
widget "form"

X Error of failed request:  BadWindow (invalid Window parameter)
   Major opcode of failed request:  18 (X_ChangeProperty)
   Resource id in failed request:  0x3e00160
   Serial number of failed request:  2049
   Current serial number in output stream:  2080

/usr/lib/mozilla-1.6/run-mozilla.sh: line 451:  4028 Killed "$prog" 
${1+"$@"}

2) MozillaFirebird -
     /usr/lib/mozilla-firebird/run-mozilla.sh: line 454:  4093 Killed 
        "$prog" ${1+"$@"}

Any suggestions will be appreciated.
Thanks in advanced.

ENV: Fedora Core 1, Mozilla 1.6, MozillaFirebird 0.7

-- 
Best regards,
Michael Stepanov,
Perl/Linux Developer
Francoudi & Stephanou Ltd.