I'm getting a lot (>42000) of the following message showing up in my .xsession-errors file (firefox:15823): Gdk-WARNING **: XID collision, trouble ahead pid 15823 is /usr/lib64/firefox-3.5.3/firefox I also see the following errors: (firefox:5767): Gdk-WARNING **: GdkWindow 0x3f02525 unexpectedly destroyed (firefox:5767): Gdk-WARNING **: GdkWindow 0x3f025ad unexpectedly destroyed (firefox:5767): Gdk-WARNING **: GdkWindow 0x3f025ac unexpectedly destroyed (firefox:5767): Gdk-CRITICAL **: gdk_window_new: assertion `window != NULL' failed (firefox:5767): Gdk-CRITICAL **: gdk_window_set_user_data: assertion `GDK_IS_WINDOW (window)' failed (firefox:5767): Gdk-CRITICAL **: gdk_window_set_back_pixmap: assertion `GDK_IS_WINDOW (window)' failed (firefox:5767): GLib-GObject-CRITICAL **: g_object_set_data: assertion `G_IS_OBJECT (object)' failed (firefox:5767): GLib-GObject-CRITICAL **: g_object_set_data: assertion `G_IS_OBJECT (object)' failed (firefox:5767): Gdk-CRITICAL **: gdk_window_move_resize: assertion `GDK_IS_WINDOW (window)' failed (firefox:5767): Gdk-CRITICAL **: gdk_window_hide: assertion `GDK_IS_WINDOW (window)' failed (firefox:5767): Gdk-CRITICAL **: gdk_window_show_unraised: assertion `GDK_IS_WINDOW (window)' failed firefox: Fatal IO error 11 (Resource temporarily unavailable) on X server :0.0. /usr/lib64/firefox-3.5.3/run-mozilla.sh: line 131: 5767 Segmentation fault "$prog" ${1+"$@"} Window manager warning: Buggy client sent a _NET_ACTIVE_WINDOW message with a timestamp of 0 for 0x3e00049 (Mozilla Fi) Window manager warning: meta_window_activate called by a pager with a 0 timestamp; the pager needs to be fixed. I'm running 64bit F11 with all the recent updates on a Core 2 Dual processor. Anyone else seeing these issues? As a side note my .xsession-errors file is over 25 megabytes in size. Paolo