Hi ! What is strange is that his hardfile (+ same KS + same settings) worked perfectly on my MiST. I was thinking it could be due to HW differences (it did happen before : different sdram timing, SD cards incompatibility).
What does the fact it does boot when disabling BBs say ?
Can you give us examples of stuff that works and stuff that doesn't ? Compatibility is MUCH better than in version 1.1 except for some ECS regressions (especially some games are too fast). I only found 1 game that crashes and which used to work (WizKid). Tried a hundred or so.