Version:           svn rev. 749288 (using KDE Devel)
Installed from:    Compiled sources
Compiler:          gcc-4.2.2 
OS:                Linux

I was told by a couple of people it shouldn't be possible, but I can't reproduce this problem in twm or kde3. This appears to be some bad interaction with gdk. I have tried debugging it further by removing the trayicon option, so I don't know how it's happening, only that it is.

Please, any information I can give to try to get to the bottom of this problem, please let me know. Thanks!

Gdk-ERROR **: The program 'gmpc' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadMatch (invalid parameter attributes)'.
  (Details: serial 9007 error_code 8 request_code 2 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.)
aborting...
Trace/breakpoint trap (core dumped)

Here's the bittrace, it looks a bit different.

0 IA__g_logv (log_domain=0x2b2f43531d74 "Gdk",
    log_level=<value optimized out>, format=0x2b2f4354e8c1 "%s",
    args1=0x7fff68f7c4d0) at gmessages.c:502
0000001 0x00002b2f4747a568 in IA__g_log (log_domain=0x2b2f47e70980 "",
    log_level=0, format=0xa2ab50 "&0000034;&65533;&65533;&65533;") at gmessages.c:517
0000002 0x00002b2f4351d73d in gdk_x_error (display=<value optimized out>,
    error=0x7fff68f7c640) at gdkmain-x11.c:641
0000003 0x00002b2f45a3f900 in _XError (dpy=0x698a00, rep=0x9a70b0)
    at XlibInt.c:2905
0000004 0x00002b2f45a46393 in process_responses (dpy=0x698a00,
    wait_for_first_event=0, current_error=0x7fff68f7c788,
    current_request=51440) at xcb_io.c:138
0000005 0x00002b2f45a466de in _XReply (dpy=0x698a00, rep=0x7fff68f7c7d0, extra=0,
    discard=1) at xcb_io.c:368
0000006 0x00002b2f45a3bab6 in XSync (dpy=0x698a00, discard=0) at Sync.c:48
0000007 0x00002b2f43061650 in IA__gtk_menu_shell_activate_item (
    menu_shell=0x8d9250, menu_item=0x939380,
    force_deactivate=<value optimized out>) at gtkmenushell.c:1142
0000008 0x00002b2f430632ad in gtk_menu_shell_button_release (widget=0x8d9250,
    event=0xa0f650) at gtkmenushell.c:669
0000009 0x00002b2f43053e40 in _gtk_marshal_BOOLEAN__BOXED (closure=0x79ac50,
    return_value=0x7fff68f7ca80, n_param_values=<value optimized out>,
    param_values=0x7fff68f7cb90, invocation_hint=<value optimized out>,
    marshal_data=0x2b2f43059e38) at gtkmarshalers.c:84
0000010 0x00002b2f467db889 in IA__g_closure_invoke (closure=0x79ac50,
    return_value=0x7fff68f7ca80, n_param_values=2,
    param_values=0x7fff68f7cb90, invocation_hint=0x7fff68f7ca40)
    at gclosure.c:490
0000011 0x00002b2f467eb0bd in signal_emit_unlocked_R (node=0x79b630, detail=0,
    instance=0x8d9250, emission_return=0x7fff68f7cdb0,
    instance_and_params=0x7fff68f7cb90) at gsignal.c:2478
0000012 0x00002b2f467ebd3f in IA__g_signal_emit_valist (instance=0x8d9250,
    signal_id=<value optimized out>, detail=0, var_args=0x7fff68f7ce10)
    at gsignal.c:2209
0000013 0x00002b2f467ec14d in IA__g_signal_emit (instance=0x2b2f47e70980,
    signal_id=0, detail=10660688) at gsignal.c:2243
0000014 0x00002b2f4315e45c in gtk_widget_event_internal (widget=0x8d9250,
    event=0xa0f650) at gtkwidget.c:4675
0000015 0x00002b2f4304d8d5 in IA__gtk_propagate_event (widget=0x8d9250,
    event=0xa0f650) at gtkmain.c:2319
0000016 0x00002b2f4304e72b in IA__gtk_main_do_event (event=0xa0f650)
    at gtkmain.c:1539
0000017 0x00002b2f43514a01 in gdk_event_dispatch (source=<value optimized out>,
    callback=<value optimized out>, user_data=<value optimized out>)
    at gdkevents-x11.c:2351
0000018 0x00002b2f474728af in IA__g_main_context_dispatch (context=0x6b5650)
    at gmain.c:2061
0000019 0x00002b2f474757a7 in g_main_context_iterate (context=0x6b5650, block=1,
    dispatch=1, self=<value optimized out>) at gmain.c:2694
0000020 0x00002b2f47475afc in IA__g_main_loop_run (loop=0x9f7510) at gmain.c:2898
0000021 0x00002b2f4304eb18 in IA__gtk_main () at gtkmain.c:1146
0000022 0x000000000041cdba in main (argc=1, argv=0x7fff68f7d2d8) at main.c:694