NSComboBox closing window problem

[Andreas Höschler]

Hi all,

a user clicks on the three dots of a combo box to view the option list and then 
(before closing the option list) tries to close the window. This crashes the 
app with

#0  0xfe4eda4e in objc_msg_lookup (receiver=0xc0b4aa0, op=0xfed3e5d8) at 
sarray.h:207
207       x.idx = indx;
(gdb) bt
#0  0xfe4eda4e in objc_msg_lookup (receiver=0xc0b4aa0, op=0xfed3e5d8) at 
sarray.h:207
#1  0xfeb043e0 in -[GSComboWindow runModalPopUpWithComboBoxCell:] 
(self=0xab01800, _cmd=0xfed3e5b0, 
    comboBoxCell=0xe8880a8) at NSComboBoxCell.m:420
#2  0xfeb040d5 in -[GSComboWindow popUpForComboBoxCell:] (self=0xab01800, 
_cmd=0xfed3ea30, 
    comboBoxCell=0xe8880a8) at NSComboBoxCell.m:379
#3  0xfeb08b07 in -[NSComboBoxCell(GNUstepPrivate) _didClickWithinButton:] 
(self=0xe8880a8, _cmd=0xfd246478, 
    sender=0xa61c400) at NSComboBoxCell.m:1914
#4  0xfde38893 in L10 () from 
/opt/GNUstep/System/Library/Libraries/libgnustep-base.so.1.15
#5  0x0e8880a8 in ?? ()
#6  0xfd246478 in _OBJC_SELECTOR_TABLE ()
   from /opt/GNUstep/System/Library/Bundles/Camaelon.themeEngine/./Camaelon
#7  0x0a61c400 in ?? ()
#8  0x00000000 in ?? ()

Any idea what to do about this? I am already doing

- (BOOL)windowShouldClose:(id)sender
{
      ...
      [mainWin makeFirstResponder:nil];
      ...
}

in the window delegate but this did not do the trick! :-(

Hints greatly appreciated!

Thanks,

 Andreas