This can also be a problem with the file places.sqlite that stores the bookmarks and the history.
Many thanks. I couldn't find the menu anywhere in FF4. Didn't feel that I should need to load a 3rd party sync app to get the job done.
Try Command-shift-b on OS X
I don't know why the "Organize Bookmarks" doesn't show up under Bookmarks when you click on it, but it doesn't. Even when you try "Help" it tells you to click on "Organize Bookmarks" under "Bookmarks." It looks like an oversight to me. But such an obvious one.
I've just tried Command-shift-b on OS X with FF 4 and it does give me the window for organising bookmarks but when I click on the little sun icon (or whatever it is) to bring up the new folder, new bookmark, etc. menu, it is all greyed out. I also found that the help feature just tells me to click on "Organise bookmarks" under "Bookmarks". Any other suggestions?
Thanks -- ctrl+shift+b works. But I am incredibly irritated that I now must press 3 keys AND remember which keys to press, instead of simply clicking the mouse on an easy-to-find tab. Is the old "Organize Bookmarks" menu item really gone for good? Can the FF4 designers be that stupid??