I am having this same issue with the latest release of word-press. After my upgrade a link appeared in my links and despite deleting it dozens of times it keeps coming back. I can’t find anywhere in the installation code that would cause this to happen. It’s not my theme, not my plug-ins. I’ve wiped everything and completely re-installed the new version of wordpress and the same thing is happening.
You go into links, delete the offending link, and as soon as you update any part of the blog the offending link is back.
I have no idea what to do now.
