I'm using Firefox 7.0.1 with FlashGot 1.3.3 and Menu Editor 1.2.7 installed. I have the following problem with the right-click context menu:
After start or restart of Firefox, right-clicking into the main window results in a somewhat messed up context menu which needs a few seconds before it switches to normal. Also, during the first few seconds when it's still messed up it's not usable. The context menu stays normal during the same Firefox session, but the problem occurs anew after each start/restart of Firefox. The picture I attached shows the look of the messed up menu.

After some troubleshooting I found out that the reason for this strange behaviour is an extension conflict between FlashGot and Menu Editor. I tested it in a clean profile and as soon as both addons are enabled the problem occurs (I'm not sure at the moment if at least one change to the menu structure has to be made with Menu Editor though).
Disabling FlashGot solves the problem as does disabling Menu Editor. As there are no real alternatives to Menu Editor I'm somewhat dependent on that extension and its developers don't seem very keen on implementing bug fixes/user support. That is why I hope to get some help or insights here. Thank you.
Regards