firefox crashes as it starts

here the konsole (yakuake) log

hfish@v2410:~$ firefox
X Error: BadDevice, invalid or uninitialized input device 169
  Major opcode: 147
  Minor opcode: 3
  Resource id: 0x0
Failed to open device
X Error: BadDevice, invalid or uninitialized input device 169
  Major opcode: 147
  Minor opcode: 3
  Resource id: 0x0
Failed to open device
The program 'firefox-bin' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 118 error_code 8 request_code 146 minor_code 3)
  (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.)
hfish@v2410:~$

Thank you for your bug report. Can you please look in /var/crash for a firefox crash report. If its not there please install firefox-dbg and run a backtrace.
How to run backtrace:
1. install the firefox-dbg package.
2. in terminal type dbg firefox
3. at the > prompt type run
4. Paste output into a file and attach the file using the attach file link on upper left of this page.

there is a problem...

I installed the firefox-dbg package, but if I try to type "dbg firefox" I get an error...

root@v2410:/home/hfish# apt-get install firefox-dbg
Lettura della lista dei pacchetti in corso... Fatto
Generazione dell'albero delle dipendenze in corso
Reading state information... Fatto
firefox-dbg è già alla versione più recente.
0 aggiornati, 0 installati, 0 da rimuovere e 0 non aggiornati.
root@v2410:/home/hfish# dbg firefox
bash: dbg: command not found
root@v2410:/home/hfish#

what do I have to do? :(

sorry its gdb firefox than at the > type run

Still got problem on doing what you requested me to do... this is the output

-----------------------------------------

hfish@v2410:~$ gdb firefox
GNU gdb 6.4.90-debian
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i486-linux-gnu"..."/usr/bin/firefox": not in executable format: File format not recognized

(gdb) run
Starting program:
No executable file specified.
Use the "file" or "exec-file" command.
(gdb) file /usr/bin/firefox
"/usr/bin/firefox": not in executable format: File format not recognized
(gdb) quit
hfish@v2410:~$ ls -l /usr/bin/firefox
lrwxrwxrwx 1 root root 22 2006-10-26 23:52 /usr/bin/firefox -> ../lib/firefox/firefox
hfish@v2410:~$ ls -l /usr/lib/firefox/firefox
-rwxr-xr-x 1 root root 8625 2006-10-23 14:49 /usr/lib/firefox/firefox
hfish@v2410:~$

-------------------------------------------

gdb told me that firefox in not executable, but as you can se firefox has execution privileges for UGO (default)

what do I have to do?

fresh install and same problem...

Thanks for your bug report. Could you please install firefox-dbg and try to obtain a backtrace (or crash report) by following the instructions on https://wiki.ubuntu.com/DebuggingFirefox This will greatly aid us in tracking down your problem.

Which flash package do you have installed?
Which Java package do you have installed?
Which firefox extensions do you have installed?

Thanks
David

sorry, now I'm using Debian SID and I'm not experiencing the problem anymore

This issue report lacks information we need to investigate further. We are now going to close the bug - please reopen when you have more information at hand.

Further information can be found at
https://wiki.ubuntu.com/DebuggingFirefox

Thanks
David