Hi All
I'm having a similar problem when switching between versions - I normally use 2010 but am developing a 2003 database for someone. I created it in 2010 but saved it as .mdb so they could use it but recently re-installed 2003 so I could check it worked okay. It was fine until I added a new field in one of the tables and on the relevant form - I then get this "object or class..." error message. I'm guessing the references might be the problem so I'll look into those.
Cathy