Hi, I installed gnome 1.0 and had it run without problem until today. This morning, the panel disappeared from the desktop. Actually, it showed for a very little time and gone. the error is as following: Gdk-Message: Got event for unknown window: 0x240012a GLib-CRITICAL **: file gmain.c: line 496 (g_source_remove): assertion `tag > 0' failed. Gdk-WARNING **: GdkWindow 0x2800007 unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x2c0002b unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x2c00006 unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x280003e unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x280003d unexpectedly destroyed Gdk-ERROR **: BadWindow (invalid Window parameter) serial 281 error_code 3 request_code 10 minor_code 0 aborting... Gdk-ERROR **: BadWindow (invalid Window parameter) serial 236 error_code 3 request_code 10 minor_code 0 aborting... Gdk-WARNING **: GdkWindow 0x3000056 unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x3000074 unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x3000073 unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x3000072 unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x3000071 unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x3000070 unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x300006f unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x300006e unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x300006d unexpectedly destroyed Gdk-WARNING **: GdkWindow 0x300003c unexpectedly destroyed Gdk-ERROR **: an x io error occurred aborting... =================================== The last thing i did to the panel was that I installed eMusic software yesterday. It ran smoothly, and I like it. Any idea? Thanks for attention. Weizhong ps: my system, Redhat 5.2, gnome1.0, wmaker 0.52, kernel 2.2.5