JBO - 2013-09-09

I noticed a pretty annoying bug recently. and I hope it's not malware.

Under the Classic view, in the embedded browser window (lower-right pane), when I hover the cursor over that section/highlight something in the news body text, the reader opens 5-10 tabs in my main internet browser. These tabs are all Twitter/Facebook buttons with some kind of warning messages. This happens about 50% of the time.
Any ideas what might cause it?

Version: 2.2.0
Build Id: 2013-05-03

Safari 5.1.9 on OSX 10.6.8