Autocorrect fixed in iOS 6 beta?

Just wondering if the following words still sometimes replace each other:

"so" and "do, as well as "if" and "of", and let's not forget about the classic "me" to "mr".

I have gone as far as DFU restoring my phone (to the latest iOS 5) and setting it up as a brand new phone (so the keyboard is factory). Every now and then the above words get stupidly replaced.

Try typing "so so so so so so so so so so so so so so so so" or "if if if if if if if if if if if if" and see if there are any replacements (obviously if you type quickly you might accidentally hit an s instead of a d but IMHO these words should never be interchanged).

Thanks