Description of problem:

For the history of my problem, please, refer to Bug 277941 (libwnck) and Bug
282691 (xchat).
I have similar problems with firefox, as well, but I haven't caught the proof
for that yet.

Well... I discovered the "-g" option of thunderbird today. I tried to make use
of it to catch some information for opening this bug report. Now I have the
initial information.

I'll attach the output from gdb, with some additional information.
You can see there that I run thunderbird as "mivael-thunderbird" executable.
I'll explain why. I'm a "keyboard guy", the one who doesn't like mouse clicking.
That's why I frequently use such form of running thunderbird as "thunderbird
-compose" (from the "Run Application" Alt+F2 dialog window) for composing new
mail messages... That usually happens so much times per day that I do it
automatically, without noticing it. I was not sure, if it's right to use
"thunderbird -compose" when debugging my thunderbird with "-g" option... That's
why I renamed (temporarily) "/usr/bin/thunderbird" to
"/usr/bin/mivael-thunderbird", to prevent accidental use of "thunderbird
-compose" form of running...
I computed (the same attachment) SHA-1 digest on "mivael-thunderbird" for you to
be sure the script was not changed comparing to the original "/usr/bin/thunderbird".

As you can see from the attachment, gdb showed me this error message when my
thunderbird disappeared:
===
The program 'Gecko' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadRequest (invalid request code or no such operation)'.
  (Details: serial 8389622 error_code 1 request_code 0 minor_code 0)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)

Program exited with code 01.
(gdb)
===

I'm not sure how to run thunderbird with the "--sync" option.
Should I just use something like the following?

   thunderbird -g --sync

("mivael-thunderbird -g --sync" in my case)


Version-Release number of selected component (if applicable):

   thunderbird-1.5.0.10-1.fc6.src.rpm


How reproducible:

I just run "thunderbird -g", and use it during the day, not closing it, even
when I don't need it...
Sooner or later it crashes. Can't predict the moment of crashing. It seems some
actions (mouse/keyboard events) results in sudden crash. It's certainly not the
same event every tim
e, but different situations after some key press or mouse click/move.


Actual results:

Process dies, thunderbird windows disappear.