[keezyrick]

I can tell you the crafting window will not work until updated.

There are changes to the UI system that aren't available to Fetish users until they get updates.

Tagging
Search for Any Item (/finditem is still available from the chat window as a command)
Pet Threat and Detriments
Journal | Collection AutoAdd
Calendar
certain Guild Event icons were added.

So, in short, your UI should work except for maybe the Tradeskill window.