Hi,
This might seem daft but is the iMovie app in the Applications Folder itself ?
Not contained in any other sub folder ?
I came across someone hwo created an IM app Folder and placed iChat and Adium and some others in this folder.
It stopped iChat from being updated.
It created issues for one or two of the others as they could not find certain parts of the app's support functions.
That is to say using iChat as an example that to do Video it uses a VideoConference.framework which is in Hard Drive/Library/PrivateFrameworks (Up one level and across one then down two levels as it were)
Adding an extra level to the "up" path causes some apps problems.
In fact iChat does this by name rather than the up across and down method and I would think other Apple Apps are the same but it might be worth checking.
The other question I would have is do you still have that iLife install disk and have you tried an iMovie reinstall ?
It is late where I am and it will be a while before I reply again.
10:31 PM Thursday; December 13, 2012
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.2)
G4/1GhzDual MDD (Leopard 10.5.8)
MacBookPro 2Gb (Snow Leopard 10.6.8)
Mac OS X (10.6.8),
Couple of iPhones and an iPad
"Limit the Logs to the Bits above Binary Images." No, Seriously