Yes im familiar with most of Kale's WIP as i like to keep an eye on what he's upto MAME wise , there are code changes fixing graphical problems with some of the games and the attract mode of Vol 2 but nothing directly mentions Pacman Arrange per say.
But yes i think your right best to wait until the next MAME release that contains all his recent work with the ygv608 grahical core before submitting a bug report.