First let me say MyGen is wonderful. I've been using it for almost two years now.
Now for the defect report:
I'm running v1.3. When pasting into a row cell in the user meta data pane, what should be pasted into the active cell is actually pasted into the active tab of the tabbed documents interface. I.e. If I have a template open, the text is pasted into it instead of the active row cell of the User Meta Data pane.
Also, the same goes for copying.
FYI: I have NOT tested any other panes.