Workflow Modeler 7.3.2 - Migrating workflows from 7.2.1

System

First off, I am in the basement of **** after re-organizing my first workflow after installing TS 7.3.2. After my eyes adjusted to the maze of lines, arrows and boxes all on top of each other, I managed to separate all the nonsense and get the model looking valid. Emphasis on "looking". So I validate the thing and fix the errors involving flows not being stuck properly to a task. And what's left is one pesky error that for the life of me I can't figure out. And in true Interwoven fashion, the error makes absolutely no sense.

It's telling me my entire Workflow Model is invalid (Element = Workflow Model). And the problem is this little gem:

Fatal error, the model is not valid!cvc-complex-type.4:Attribute 'from' must appear on element 'Flow'

I'm ready to throw the monitor out the window. Anyone have a clue what that means? The same exact model validates fine in 7.2.1.