plus I got some yellow gurus on startup too after the intro, I had to completelly erase the flash
This problem has been isolated to a bug in the bootloader that occurs when SetPatch has installed the exec.library update from boingbag 2. New bootloaders will be provided soon. The guru itself is harmless and can be avoided by either using a redirection to >NIL: instead of QUIET in the SetPatch line or by placing the ROM Updates in the flashrom and using NOROMUPDATE, or by skipping the exec.library update using SKIPROMUPDATES "exec.library".