Sorry, let me clarify. "Worked fine last week" in my post title meant that it worked fine before f3 patch. Then it started crashing after I allowed the patch to install (apparently my updater was a few months behind since it only pushed that patch last week -- ?). When crashing began, I uninstalled the f3 patch. The current version you see that I have is with f3 uninstalled, and it no longer crashes with datalogging. So, I'm fairly certain that if I accept the f3 patch again that it will kill my datalogging functionality again. And that's why I'm asking if there are known issues with f3. Make sense?