Looking at the content and where it goes, it appears to be related to the web content in the GUI
At first I thought it could be related to the new "monthly report" feature that I had turned off soon after the update. The reason is that the content of my current file is only:
11/29/2011, 11:48:21 HttpSendRequest returned 12002 for:
11/29/2011, 11:48:21 HttpSendRequest returned 12002 for:
11/29/2011, 11:50:34 HttpSendRequest returned 12002 for:
11/29/2011, 11:50:34 HttpSendRequest returned 12002 for: (which I thought can be explained by the "monthly report" feature disabled, but I'm probably wrong)
However, looking at the image you posted it also could be related to the html content in the GUI of course.