I just installed the patch. All my saves were 1.41 and everything I had a problem with is now fixed. Wonderful job, I can even hear lots of music tracks i've never heard play before.
Battlefields are fully exitable in Act 4, stocks regenerate and so far (I keep respawning to check) I haven't seen any "Rat's tooth" in merchants inventories (which is meant to be full plate armor).
I can now finally tackle the final enemy with some potions, updated skills and some new armour.
Here's hoping everyone has as much success with their bugs. Great job.