I noticed yesterday that Five Guys on Forest Drive in the old Forest Lake Exxon building was closed. I figured maybe they were buffing the floor or fixing some sort of plumbing issue, but they remained closed on Monday and from what I can see (which isn't too much as I couldn't get a close look) there is major work going on in there. The website doesn't offer any additional information other than "closed today", but the fact that it's still listed leaves me to believe they will be back.
It will be interesting to see what they are doing, as the building was completely refitted just a few years ago.
UPDATE 23 January 2013: Added some daylight pictures, though still not very good ones.
UPDATE 31 Jan 2013; Work is complete and the place is open again.