Twice this has happened since the patch.
My Town Vault Inventory is reverting back to what it was at the beginning of the old Act when moving on to a new Act.
This happened when I went from Act 1 to Act 2, inventory reverting to beginning of Act 1 (while in Act 2).
Then again when I went from Act 2 to Act 3, inventory reverting to beginning of Act 2 (while in Act 3).

NOTE: This can be fixed by simply logging to character select screen and logging your character back in. The inventory will be where it should be.
Obviously this certainly needs to be addressed, but this "Band Aid" fix should help until then.