Hi,
for those already worried about Oplocks and similar MS-OS niceties and still supporting dbf's for multiple users:
Vista may add to your problems. Read about it at
http://support.microsoft.com/kb/935366/en-us#While I think for heavy multi user access any kind of CS approach is the sensible choice today, a possible freeze on the second instance of flat file RDMS sounds ridicolous. How often does this happen and why could it slip through testing ?
thomas