Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a5pre) Gecko/20070531 Minefield/3.0a5pre ID:2007053110 [cairo] "Bookmark This Page..." in the main menu and the right-click context menu sometimes don't work. Unfortunately it's not reproducible, when it happens, choosing "Bookmark This Page..." causes nothing (doesn't show the window to choose where to put a new bookmark). It shows nothing in the error console. I have to restart Firefox to make it work again. I have no extension installed except for Nightly Tester Tools.
Bug 451915 - move Firefox/Places bugs to Firefox/Bookmarks and History. Remove all bugspam from this move by filtering for the string "places-to-b-and-h". In Thunderbird 3.0b, you do that as follows: Tools | Message Filters Make sure the correct account is selected. Click "New" Conditions: Body contains places-to-b-and-h Change the action to "Delete Message". Select "Manually Run" from the dropdown at the top. Click OK. Select the filter in the list, make sure "Inbox" is selected at the bottom, and click "Run Now". This should delete all the bugspam. You can then delete the filter. Gerv