I feel like the code is pretty young and am hoping many more bugfixes are on the horizon.
I have had the mode select and/or spacium store appear on the LCD while in a multiball, and not as a result of hitting the beta capsule hole.
The interaction between having multiple things running modes/multiballs/etc seems inconsistent... maybe I just don't know the rules yet.
Friends who operate a halloween on location have mentioned things like if people put in $2 for 3 games, play a two player game, credit #3 disappears, also mentioned they cannot add service credits or adjust replay scores.
I've seen one or two of the modes where artifacts from the screen up before the started remained, like the balls left and credit count stayed on the screen...
I am hoping and assuming the bugs will get worked out. R&M felt much more polished when we got it, but we were #260 there and had a much lower number , #57, for Ultraman, so that could be part of it as well.