From Bugzilla Helper: User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows 98; Win 9x 4.90) BuildID: 20010628 if you delete mozilla with a language pack installed, the setting remains in the profile making it unable to start mozilla with that profile Reproducible: Always Steps to Reproduce: 1.download and install a language pack in http://www.mozilla.org/projects/l10n/mlp_status.html 2.delete your copy of mozilla and install it again, or remove mozilla and install netscape in the same place 3. Actual Results: crashes after read user-locales.rdf indicating a langage pack that not exits anymore Expected Results: show a error message or ignored invalid information in user- locales.rdf

Reassigned to tao.

Switching qa contact to jonrubin. Jon, is this a known issue/duplicate of another bug? Otherwise please reproduce and confirm this bug.

I believe this problem had been addressed in 86807. Mozilla will failover to a default langpack when the requested one does not exist or version number does not match. *** This bug has been marked as a duplicate of 86807 ***

Verified. Bug 91721 appears to be a consequence of the failover mechanism; without the failover, the UI language would switch and menu items would be missing.