I'm getting that XLINK error, too. It happened a while ago - I was in the middle of working a friend's client facilities when it happened. I've cleared FT memcache, I've cleared my browser, too - Google Chrome. I closed the browser, reopened but still get the XLINK error.
In case this is helpful, maybe it occurred when the yellow banner was released? When the XLINK error appeared I noticed that the yellow banner with "Check Details" also appeared.