Steps to reproduce: 1. Go to http://www.pnas.org/content/suppl/2006/11/14/0605645103.DC1/05645Table8.html 2. Open Inspector 3. Go to resources, and click on the html file 4. Scroll around Webkit hangs. Marking as P1, as this is reproducible. Tested with r37126 on 10.5.5 on a MacPro