I found a cool theme that I like and downloaded it to my 'berry. After I downloaded it, I realized it was for OS 4.5 (I have 4.6) and it was also for an 83XX series. I'm tired, and didn't notice :P
It downloaded successfully but isn't a theme option now, and I also can't find it anywhere. I looked on the memory card and in device memory, and in my download folder.