Clone and Heal tool messed up setting?

[zeuspaul]

I can't figure out what I did to my clone and heal tool.  The little x that is usually in the center of the tool selection area is now offset towards the top.  It also doesn't work like it usually does.  The whole selection area within the tool doesn't work properly.  It seems only the upper portion works properly.  I exited Gimp and came back in but that didn't fix the problem.  I can't get a screen capture because the little x inside the selection area doesn't show up.  It has gone away and come back a few times.  I can't figure out what I have done.