I do probing in all three axes about a hundred times a day, and it works perfectly. I'm using 3.042.020, which has proven reasonably stable over the last 6+ months, and the "ogb" plug-in. You might want to give that version a try. It is, for reasons I do not understand, sometimes seemingly necessary to put a Sleep(100) in your macro after writing a DRO, and before doing anything that depends on having the DRO updated. But I don't believe there's any problem with the SS itself. I have never once had a problem with probing, since using the above combination of code versions.
Regards,
Ray L.