Well, the end result is still the same - you get get buttons with icons that can't be seen. Would a list of icons having this problem help ?
Well, I'm unfortunately already quite overcommited. There seems to be no shortage of Fremantle theme designers - maybe some of them could step forward for such an important project ?
So if it's not used & badly broken it might be safe to remove it ? Not sure if there is some easy way of doing that or if you need to tell the super-testers or repo admins.