Was this ever resolved? I just got this issue as well. It is definitely Ebay Feeds causing the hiccup. All other plugins were deactivated, and eBay Feeds was the culprit for Visual Editor not working anymore. For a client’s site, and they’re not going to be too pleased when they see that their ebay items aren’t on their site: planetscubausa.com.
For now I am going to just have to disable the plug-in when I make changes to their site, then re-enable. But this setup is far less than optimal.
Thanks in advance, Rhys!