Not critical at all, but a bit annoying:
1. Editing a field in the hotspot list has the same quirky behavior as in the Hotspot Proxy IS box in the skin editor. See this thread.
2. Editing the scaling field in the Appearance tab of the skin editor ditto
3. When changing some settings in the parameter window in the output section you will have to leave the window with the "OK" button. Clicking the red dot will throw away the changes.
4. The various 'Save as' commands give an empty namebox and not the current window name. Cancelling the 'Save as' command will reset the window name to <empty>