How to fix this
Have you used FMRTE before?
Wow that is really strange, I've never seen something like that before. Try re-loading your skin or possibly changing it to fix this problem? Follow these instructions to re-load your skin:
1) Press Shift+P to open preferences.
2) Go onto the 'Display and Sound' tab
3) Check that 'Use Skin Cache' is unticked & 'Always reload skin on confirm' is ticked
4) Press confirm
If that doesn't work then I genuinely do not know, I would imagine it's a problem with your PC.