I've encountered just one problem so far.
For my combo points, I've long been using PowerAurasMedia/Auras/Aura89 - 93. When I choose an aura, I find that 89-93 have opaque backgrounds, as compared to most of the others which have transparent backgrounds. If I set them to Glow, the entire thing becomes transparent, including the part I would like to have opaque.
Anyway, I know how to edit a tga, that's no problem, but I don't know how to tell WeakAuras to USE the tga. Can someone point me to that bit of info?