We ended up having to disable the static 'student name' column since the scroll bar kept getting 'lost' in the parent window and instructors didn't know to scroll down! And because of the wrapping line-up problems.
To help our instructors view their gradebooks with more ease we limit the number of entries to 8 per page. Although I'm very surprised there is no 'show all' link ??!! I've already had a few complaints over this but limiting the records does make it more useable for the majority.
Thanks for the tips, very useful
Susan