To tell the truth I wish we had'nt upgraded to Access 2000 at all, it uses a lot more of the system resources. It may be worth trying some of the analysis tools on Access 2000, this will highlight any problems you may have.
One thing which probably would'nt cause problems for most people was that Access 2000 does not support Foxpro files, this was a nightmare because our whole system is based around Pegasus Operations, which only uses Foxpro files.
If anyone want's to know how to link Foxpro files with Access 2000, let me know.
Andrew.