Comment 17 for bug 78809

Firefox crashed again today (all windows disappeared, after some seconds when they weren't functioning); backtrace from apport attached. Restarting it normally worked, so I couldn't test anything else.

Something like "checking your add-ons are compatible with the new version of Firefox" had appeared on startup (presumably referring to the update to 2.0.0.5); the pages I had open when it crashed were: http://www.randi.org/education/links.html
http://ods.od.nih.gov/factsheets/calcium.asp and http://www.sciencedirect.com/science?_ob=ArticleListURL&_method=list&_ArticleListID=601294619&_sort=d&view=c&_acct=C000010360&_version=1&_urlVersion=0&_userid=126524&md5=977fb539ecd73c70756a7ceaf8448d0e (two tabs in one window)
http://www.sciencedirect.com/science?_ob=HelpURL&_file=qs_main.htm&_acct=C000010360&_version=1&_urlVersion=0&_userid=126524&md5=19dafca93101182f345c5c407c9fecd3 (in the process of loading in a new window when the crash happened)

Since this backtrace, and several others I have had, point to __kernel_vsyscall, is there anything else I need to post so you can tell which thread crashed?