There exists problems with several versions of the network redirector provided with the Windows 95 Microsoft Client for Microsoft Networks that can cause data corruption in DBISAM tables when they reside on a shared Windows 95 server. One of the problems occurs when the network redirector (vredir.vxd) improperly caches server data locally and can cause various problems such as key violation exceptions with auto-increment primary keys and others that should never occur. If you are experiencing random problems with data corruption when sharing tables in a Windows 95-only environment then please download the updated network redirector and apply the update to all Windows 95 machines on the network. These problems do not occur when accessing Novell Netware servers.

You can find out more information from Microsoft regarding this issue by clicking on the following link:

http://support.microsoft.com/default.aspx?scid=kb;EN-US;q174371