Initially I thought my initial cause of BSOD (by moving and mounting an image to another drive) while the system was running was the cause for the F4 stopcode from BSOD on boot. But after browsing a few posts I'm not the only one. What a relief. I am currently using mount on logon and have not had any problems.
Just out of curiosity; how many of you out there with this issue have an SSD boot drive? I wonder if its the faster boots causing the problem?