You are not using a resoure pack, right? Are there other Mac users that have the same problem? Any bug i can not replicate in my dev setup is extremely difficult to fix. Like trying to defuse a bomb 20 m away by throwing stones at it...
Yeah, as I said, it was posted on the original gt thread. I believe it was another mac user but greg said he didn't know because "he didn't apple and he never will", or something along those lines. x)
Funnily enough (And at the same time annoyingly), it doesn't matter at all if I use a texture pack or not. With or without it, the gem textures are never shown.