>After I read this ... ftp://ftp.alaska-software.com/documents/OPLocking-Overview.pdf and knowing that most of our "writes" are done under a transaction both in dbc/dbf and jet databases, is it just me, or should I be worried. We've been running in Vista and Windows 7 for some time without any remarkable problems.
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>Thanks for any light you could shed on this.

If you have write heavy multi-user tables, this will touch you - but you should not be worried about your data, mostly for perf.
Read up on SMB2 on those newer OS to give you even more stomach acid - this time on data itself.