"Undefined index: labe..." in label column of VisitorLog

I upgraded from 0.4.4 to 0.5.1 by unpacking into a new folder and copying my config/config.ini.php file as suggested to avoid the automatic upgrade errors. When I go to the VisitorLog the “Label” column reads “Notice: Undefined index: labe…” for every row. Any suggestions on how to fix this?

It appears this is fixed in 0.5.2.