I had problems on my systems in January with the MySQL MyODBC driver version 3.51.10, and I ended up rolling back to version 3.51.09, as I posted to the Fox Wiki here, the Leafe.com ProFox forums here and the MySQL Forums here. Remarkably, I didn’t blog it also, but I was busy.
The good news is that the new driver, version 3.51.11-1, seems to fix the problem. Rolling back to the old driver also required additional work to use a weaker password technique, so this is a welcome fix!