Whilst testing an FM12 conversion from FM11 - I found one of my scripts had broken due to the Insert File command.
The script couldn't insert the file I wanted because the field was not on the layout. The simple solution was to add the field on the right-hand-side of the layout, which is the non-veiwable area.
Haven't come across any other problems yet. Once I have confirmed the list of plugins we use works with FM12, I will post it here because it's a little easier than having to find out for yourself.
Just thought I would make others aware of this problem. Has anyone else come across this?