I've just done a complete re-install of the 733 after having poor performance issues and am now having this issue, I wasn't previously until I installed V5.3 HF1+lights so that's an odd one.

I also noted that occasionally when in external view the entire external model will be illuminated by the strobe, its consistent on certain angles and inconsistent on others. Is this potentially a P3Dv5.3HF1 issue?