I’m having the same problem. Code to enable an adfly popup window has somehow been injected into my site code. Will update when I locate the source, but the appearance of it and it’s behaviour is very virus-like.
Thanks for your response. I am happy to delete the DB and make a new one. Isn’t that what happens by default when WordPress is removed and reinstalled? I’m using GoDaddy WordPress control panel.
This problem still exists, at least with Cart66 Lite plugin. Clearly a bug.