User Agent: Mozilla/5.0 (X11; U; Linux i686; fr; rv:1.9.2.22) Gecko/20110906 Fedora/3.6.22-1.fc14 Firefox/3.6.22 Build ID: 20110906122904 Steps to reproduce: Subscribed to RSS feeds. Default settings are to view messages as plain text, which works fine as long as I read them in the main window (or in a new tab of the main window). However, when trying to read them in their own window (that is, double clicking on them), the whole html page loads and there is no way to change that as the "View > Message body as" menu does not exist for the new window. Note that this menu does exist for flux messages in the main window (and obviously for regular emails).