I notice that it was generated with DatUtil 2.0 but says 'Generated with DatUtil 1.32' in the comment.
It's nice that DatUtil 2.0 is now released because by default it does everything that I used to do in steps:
1) Apply old fix-merging twice (the simple algorithm meant it needed running twice).
2) Remove duplicate ROMs.
Now it is impossible for anyone to generate a MAME dat that can differ from mine, lol.
Logiqx