I have seen an issue where citrix creates a key called citrix and in it is another key called citrix and in it is another key called citrix... over and over until a depth limit is reached. I can't remember where it happens, but I think it may be in the user profile.

There is a similar problem with mixing NT4 and win2k profiles as one of these renames a .pol file to .pol.bak. So next login you get a .pol.bak and a .pol.bak.bak etc until the .bak.bak.bak reaches a filename length limit.

hth

cj