4. Hitting 'enter' after editing only sometimes gets you out of editing mode; seemingly only if your expression is well-formed? 5. 'Clear' clears some lines bu

4. Hitting 'enter' after editing only sometimes gets you out of editing mode; seemingly only if your expression is well-formed? 5. 'Clear' clears some lines but not all. It usually seems to clear all but the top two lines for me. Chrome v.36 in Ubuntu