For those poor souls still following this problem :

We've found the problems root cause is NDIS 6. It seems TCP chimnney stack implementation by default in Windows updates /...

An email from a reader of this forum has prompted me to post my conclusions.

Firstly, to re-cap on how we got the errors - they only occurred when Crystal Reports...

More discoveries.

I see this behaviour on SQL 2000 SP4, but not SQL 2000 with no SP's.

In my situation, SQL 2000 with no SP seems to cause my application to be...

Ok, I've made some discoveries.

It doesn't seem to be a SQL or OLEDB problem. It certainly seems to be (in my case, anyway) related to Crystal Reports.

I found the...

I'm seeing this on SQL 2005, SQL 2000 - on both Windows XP and Windows Server 2003.

I can reproduce the problem reliably, but using our rather large ERP software (that...