Multi Step OLE DB errors

I've got a program that works with an Access DB. Users are getting multi step Ole DB errors in a couple of different spots. Of course, I don't get any of these errors on my dev machines, using the same version of the program and the same db.

Does anyone have any hints of things to watch for that might cause these errors on a client machine? The db is a shared db on the network, program was just deployed so there's probably 2 users in it right now, both in different areas. Client machines are Win98, dev machine is XP. Jet 4.0.

Didn't get any of these errors in testing either, then again, my testers didn't do a whole lot, but were able to user the functions that are now producing the errors.

Multistep can be overflow messages. ie Too big values for the field.

check your mdac versions also