If you brining up the install window, and with no packages showing (because the CD is not mounted or another directory has been set in preferences), then try to change the filter criteria using the pulldown button, it will segfault, bring up a "crash" window, and then dump core.
This is now a duplicate of bugzilla #6611 which wasn't there when I started entering this one...
*** This bug has been marked as a duplicate of 6611 ***