I think I have had the same problem as he is trying to describe.
What happens is that Caps lock is suddenly switched in Blockland itself.
The keyboard registers Caps lock off while Blockland types with Caps lock on.
This wouldn't be much of a problem if you don't have to switch to other windows like your browser.
Otherwise you will have to keep flicking Caps lock on and off to just be able to type normally every time you switch windows.
Press caps lock till you are no longer typing in caps in Blockland.
Alt tab.
Press caps lock till it is off.
I think this might indeed help.