User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1 (.NET CLR 3.5.30729) Build Identifier: 3 beta 3 Once I view a message in tab, I can no longer access the accounts tab. The last email viewed remains visible with no way to get the account/folder list back Reproducible: Always Steps to Reproduce: 1. Open thunderbird 3 beta 3 2. Click on an email -> show in a tab 3. close the tab. Actual Results: The last email is still displayed. No way to get the account list back short of closing and restarting

Reporter it seems a dupe of bug #504552 see comment https://bugzilla.mozilla.org/show_bug.cgi?id=504552#c6 for workaround. Feel free to reopen it if I0m wrong.