Vista - Bizare Permissions Problem with "My Documents"

I am using an old piece of code (someone else's) which tries to write to my "My Documents" folder.

I know that this is a junction and all the good stuff, and should 'just work.'

However for one of the account on my system, when the code runs its reports that it can't write to "My Documents".

I have tried setting the permissions on that accounts "My Documents" and Documents folders to match that of users that don't have this problem, but that doesn't seem to help. It is almost as if there may be permission settings I can't access.

Any suggestions?