Description of problem:
When I start gnome-terminal it crashes with the following output:

$ gnome-terminal 
The program 'gnome-terminal' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 106 error_code 8 request_code 78 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.)
$

This only happens when I connect second monitor to my PC. When running with a
single monitor even with Xinerama option in the xorg.conf it's working fine.

Running that under gdb shows

$ gdb --args gnome-terminal --sync
GNU gdb Red Hat Linux (6.6-8.fc7rh)
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 "i386-redhat-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) run
Starting program: /usr/bin/gnome-terminal --sync
[Thread debugging using libthread_db enabled]
[New Thread -1208518944 (LWP 3228)]
The program 'gnome-terminal' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 138 error_code 8 request_code 78 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)


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

gnome-terminal-2.18.0-1.fc7

How reproducible:
Always

Steps to Reproduce:
1. Connect 2nd monitor
2. Run gnome-terminal
3.
  
Actual results:

Gnome terminal crashes

Expected results:

Running smoothly

Additional info:

Erm...