what's interesting: The mentioned royalmj (and clones) set didn't change from 119u4 to 120. Is it possible that you accidently switched merge modes in between?
...and please test an official MAME binary just to be sure ;)


Additionally:
1) send me the zipfile (before doing 2-3)
2) for a test, turn on settings->compressor->Full Zip Structure Scan (slower zipscanner but detects some bad zipstructures)
3) try to rezip the file in question manually (decompress, delete zip, compress files to new zip)



Roman Scherzer