In 3.0 and 3.1alpha if one discards MVC and then touches the TextMorphEditor code then strange things start to happen.
For instance:

Take a virgin 3.x image
discard MVC
then edit the mouseDown: method of TextMorphEditor, just add a line or a character, then accept it.

Every mouseDown to a text window after accept causes a walkback.
There are variations of this bug that can be created by various means this is only one way of creating it.
As of now I don't have a solution to it.

Cheers

Tansel