Found an issue so far with the near perfect Rainbow theme... Not sure if it is able to be fixed or not, as I believe it is only an issue with the Rainbow Theme's font you have changed it to Krysyy.
I can change button font sizes. I don't see that button since I'm a supporter under this purple, so that would explain it.
I agree. I've had to switch back to normal because it's too painful to read. Arial and Trebuchet work just fine for me
The next morning I did switch back, don't worry. I can be a little tired and still cope with Comic Sans.