TMainMenu Problem

I recently upgraded to Delphi 4. The project I am working on was created
with Delphi 3. All went well until I added a TActionList component and
began converting my menu items to use the TActionList. The problem seems
to be with the TMainMenu. If I make a few changes then exit the menu
designer and then try to go back in to the menu designer, Delphi 4 locks
up and the Menu Designer flashes on and off the screen. If I avoid going
back into the menu designer or make all my planned changes at once, I
don't have any problems.

Anyone else have a problem here?

Thanks,
Mitch Godfrey