mozilla browser 실행시 다음과 같은 error가 나타나는데 뭔지 모르겠습니다.

WCC01:/home/memnon/Work/project/SPACE_2009 ] Starting browser ...
libgcc_s.so.1 must be installed for pthread_cancel to work
X Error of failed request: BadWindow (invalid Window parameter)
Major opcode of failed request: 20 (X_GetProperty)
Resource id in failed request: 0x140000a
Serial number of failed request: 16513
Current serial number in output stream: 16513

(mozilla-bin:6804): Gtk-WARNING **: A floating object was finalized. This means
that someone
called g_object_unref() on an object that had only a floating
reference; the initial floating reference is not owned by anyone
and must be removed with gtk_object_sink() after a normal
reference is obtained with g_object_ref().

Redhat 4 enterprise에서 run level 3로 설정하고 xterm 으로 사용하고 있습니다.