Don't use iMovie, but it sounds like that it might be a 32 vs 64 bit issue.
In any case, you would probably get more help if you posted this to the iMovie section instead of the Mountain Lion section.
Thx much for the reply. I have been using iMovie for years and NOTHING!!! has changed.
This really, really s....ks that I am now getting this, very, very, very error message that "Sharing requires more memory to be available. Quit iMovie and relaunch it"
Something is very, very wrong and different.
This all seems to be happening since I now am also getting this message about "Dropbox"
"Drop Box Items Waiting"
There are some items waiting to be imported in your iMovie Drop Box. If you'd like to use them in iMovie, choose “Import Now.”
No clue as to why these stupid messages are now appearing nor is there a way to "delete" them