Sorry to report this off topic, but where should I report this otherwise? (no Windows 8, 8.1 or Blue board)
I think I found a bug in the W8 Touch Keyboard when using the SHIFT to Caps Unlock option.
Once you pressed Caps Lock (or double tap Shift) you cannot Caps Unlock without loosing the Touch Keyboard.
When pressing Shift, the Touch Keyboard disappears and you have to open it again, or
When you press Caps Lock again, the Caps Lock and the other keys get switched back to normal, but input still creates capitals.