So far we have:

Crafted shields*: some are disappearing outright, some have armor rating of 0

Shields crafted after the patch are not affected

Huge, blocky cursor
Blackwall's shield not appearing on his back even if it's equipped - re-equip it and it will show up

Some reports of being unable to toggle "walk" off to go back to "run"

Also:
Some reports of being unable to import a custom world state on a new playthrough. This does not appear related to Patch 3, as people have tested before patching and it's happening then as well. It's probably just a temporary glitch.

Update: The Keep team has tweeted this issue is fixed - if you are still seeing it, send them a tweet.

*A hotfix to the crafted shields issue was released a couple of days after the patch.