I select my mouse type--Intellimouse (PS/2)--under the new GTK+ installer. This is correct in the /etc/sysconfig/mouse file and gpm works properly. However, it is not correct in the /etc/X11/XF86Config file--it is listed as PS/2 instead of IMPS/2--resulting in wholly erratic mouse movement under X.
Duplicated with an Intellimouse in our lab.
*** This bug has been marked as a duplicate of 5787 ***