10.6 School Network - iMovie 11 Crashes when Importing - insufficient privileges

Question

A network recently upgraded from 10.5 to 10.6 and iLife from 9 to 11
Exporting Movies from I Can Animate to the network Home Folder and then importing into iMovie for editing, iMovie decided that the file didn't exist the first time then subsequently crashed on the second attempt.
Trialed a test exporting from iMovie and importing back into iMovie. This worked
First port of call, update the software.
Tried importing again. New message,  insufficient privileges.
Solution:
Go to the shared drive where the Home Folders are located on the server. Use the righ click get info option rather than using WGM or Server Admin. Add the Student user group to the Sharing and Permissions area and apply to all enclosed folder.
This appears to fix the problem. I can only assume that the upgrade of either OS X or iLife had reset the privileges. I'll be keeping an eye on it and I'll be adding to this thread if the issue arises again.

Answer 1

An alternative solution....for now. If you copy the files to your desktop or in any other folder you want them (it's temporary), you can still import them in iMovie. Just click Archive, Import, Movies and search for the folder you put your files in. I did it several times with success, that means no error! Now I can use my files and edit them in iMovie. You can delete the files on the desktop, since iMovie has copied the files into the iMovie library.
Another possibility is drag and drop the files from your desktop directly into an event. iMovie will copy the files into the library. For both options I am not sure if analysation for stability en recognising persons had been done while importing, but I guess you can do that later on.
Do not make the mistake of importing them in Aperture or iPhoto, drag and drop it an iMovie-event and delete it in Aperture/iPhoto... You will only hear the audiostream, you will see miniatures in iMovie, though your videostream is gone. That's how I lost the first video of my second daughter .
Until there's a good solution or update from Apple it works for me. I hope it does for you too!