Hitting the tab key in the Anonymous Apex Editor switches the focus to the Log Filter Text Entry. It would be nice if it just did a tab in the editor.
Initially, I didn't notice that I had typed some stuff in there and assumed I had nuked my anon apex script.
The Anonymous Apex Editor is saving my life right now, because the Developer Console doesn't save the script consistently, and the live code link from the error logs to the code saves tons of time, and the code completion is a complete lifesaver.
It would be super if the Anonymous Apex Editor had all the features of the Apex Class Editor, including all the editor features and, most importantly, local history!
This is a killer feature!