I recently upgraded from Ubuntu natty to precise which upgraded my kernel from 2.6.32 to 3.2.0. Since the upgrade yesterday I've noticed that certain websites don't load correctly. It appears to be sites that have a large number of images (500+) don't fully load. Looking at the network graph in chrome (F12) it shows that they timeout. I'm wondering if there is some kind of maximum concurrent connections or something.
If I use a socks proxy through ssh (ssh -D) everything works fine so it's definitely something with the iptables masquerade in 3.2.0.
My firewall script is MonMotha's firewall script (http://ostatic.com/mothafirewall
I realize that this is somewhat vague but any thoughts are greatly appreciated.