Comment 82 for bug 300693

I would recommend against discounting the wireless as a factor. While it has been reported with both the Atheros and Intel chipsets, I've yet to see a report without wireless in use. In fact, since I've started exclusively using a wired connection for my work (wireless simply can't transfer the data volume I need) I haven't experienced any lockups. As far as I can tell, wireless use is actually required to replicate this issue.