For the upside-down English UK text some of the letters aren't correct.  

I personally like it like this because it looks cool but it might be a bug so I just reported it

The letters I've noticed are "B" which sometimes becomes a box, "c" which sometimes becomes something like a refresh symbol, "l" which sometimes doesn't flip over and sometimes is like a right angle I guess and "g" which sometimes has a longer tail and is more square like

I hope its not a bug because I like it but it might be.