Pete, I had the same problem, and they told me to hire them at 100-150$ per hour to have them fix this issue. 

 

Did you come up with a solution to this on your own?  I am having it happen in an the update part of formview, but not insert portion. 

 

My solution was to remove the button from the configuration, and then point my client who will be doing the editing to this solution:

 

 

It ain't great, but its better and faster than the cute editor spell check, and hey, guess what?  It also works.  :)