I don’t know if it’s my machine acting funny again but…
I put “title” in the rename mask and “title + artist” in the compilation mask. The Rename Mask radio button is checked, but renaming files uses the compilation mask instead. I edit the compilation mask to match the regular mask and it gives me what I want. Also, when I switch the radio button to compilation mask, hit save, and open prefs back up again it’s back on Rename Mask.
Can anyone confirm this?