breaks other scripts, diminishes editing capability

SUMMARY
When this plugin is enabled, the TinyMCE editor stops functioning properly. A few symptoms are that the editor can no longer be resized by dragging the lower right corner, clicking the HTML or VISUAL editor tab can cause it to show 2 copies of the editor (one HTML and one VISUAL), and also that major edits to a page can fail (e.g. deleting a major portion of it)

BROWSER/OS: Chrome/XP, FF5/XP – haven’t tested others

TO REPRODUCE:
1. install plugin + enable
2. open an existing page
3. try to resize the WYSIWYG, click the HTML edit tab, or make a major change to the page and then click update.

WORKAROUND
none for complete funtionality, but the plugin can be deactivated to make scripts work again.

NOTES
No errors thrown in JS console, source code looks the same whether plugin enabled or disabled. Difficult to diagnose the root of the issue. I have disabled every other plugin to try to isolate this.