The specific styles in question are:
_ANGELS
_CRIMSON
_SOLEMN
_CARLOW
_LAIOS
_HOWCOME

We accidentally included these with RT Sets even though they use an RT from the 49PAK. Sorry about that. This has since been fixed. We rarely delete files with an installer, since that could cause worse problems then it fixes, so the patch doesn't delete them. Instead, if you don't have the 49PAK, you can simply remove these styles from your Styles folder, and they will no longer show up as "RT N/A" in the StylePicker after a rebuild.

Thanks for pointing out the RT set video mention of the style, we'll correct that. Please message me to follow up or for more advice.

_JUTAI is an oddball, I thought that was fixed but it has managed to slip through the cracks. I have fixed this now and will add it to the patch. You can fix it yourself in the meantime by opening the StyleMaker (Ctrl+shift_F9 -- click MISC and re-select the RealDrums, then save the style.) One other style I noticed that has a small issue currently is _VIBE.STY, it should use PopWaltzBrushesEv RealDrums. We'll add that to the patch as well.

I will point out that there are over 300 new styles (that is, RealStyles / .STY files) this year not including Xtra styles, and there are lots of styles available for each of the new RT sets. Also, it is normal for styles in a particular set to use RealTracks from a different set. I.E. a style will showcase a RealTracks instrument from the set, but we don't limit the style to using RT instruments ONLY in that set, because that would limit the quality and diversity of the styles. So there are situations were someone may have Styles that are missing certain RealTracks. You can hide these in the StylePicker by selecting "only show styles with no N/A RealTracks"

Andrew
PG Music Inc.