Comment 13 for bug 411691

[Exception... "update.locale file doesn't exist in either the XCurProcD or GreD directories" nsresult: "0x80520012 (NS_ERROR_FILE_NOT_FOUND)" location: "JS frame :: file:///usr/lib/xulrunner-1.9.1.3/components/nsUpdateService.js :: getLocale :: line 549" data: no]
file:///usr/lib/xulrunner-1.9.1.3/components/nsUpdateService.js
Line 549

I think you already figured it out, but I post this just in case it may be useful.