Is locking up after I complete each puzzle whether I do it right or wrong.  The only way to move on after the puzzle is complete is either close the puzzle or refresh.  In either case it does not hit my history.  It was not doing that this morning.

Hm, it works fine for me. What browser are you using?

Not that I have a choice since its on an office computer but IE the same one I was using this morning when it worked for me. 

Now they're showing up in my history as skipped but at least ti seems to be working again.