I knew I needed to burn at UDF and version 2.5 but thanks for reminding me. Anyway, I tested it on my PS3 and it doesn't work :-( I tried burning it again and it still didn't work... However, I haven't updated my PS3 in a while, I'll update then try once more.
EDIT: By the way, I have successfully played home made AVCHDs/Blu-Rays on my PS3 before, if anyone's curious.