Yep have the same problem. ClrMamePro works Ok. Maybe to do with the new CHD format? The output from MAME -listxml looks the same as always so not sure what DatUtil doesn't like.
Yep, that looks like it fixed it. There was mention of a bug fix to the -listxml output for 0.145u3 but still had the same problem until I followed the above link and replaced DatUtil with the version on the link.