I tried removing all CSS and the same strange behavior occurred.

 

 

When I was in FireFox, I used FireBug to verify that there were no CSS files referenced and I noticed that there were about 20 references to the CuteEditor's ToggleBorder.css

 

It seemed to be 1 for each time the ToggleBorder button flashed and one of the mystery rows appeared.  

 

 It's like the editor keeps trying to load ToggleBorder over and over