Michael,
>When I ran more tests on the development PC, I was able to simulate the same situation. It is just that it takes more time as this is not the same power as the servers.
Since you have reproducible errors, did you send a bug report ? The MS bugreporting for vfp works again
http://connect.microsoft.com/VisualStudio/feedback(I reported a small bug this month and it was checked/worked upon within a couple of days) and a previous unclear situation involving SQL/sys(3054) I came upon and posted about last month here on the UT (not directed to "all" but to Aleksey Tsingauz) was answered (with a workaround included!) within days as well.
my 0.02 EUR
thomas