Windows 7: Pinned sites are slower than non-pinned sites.

When browsing a website that I have pinned to my taskbar (Facebook for example) I've noticed that the pages take longer than usual to load. When it does load, the page becomes very choppy when I'm scrolling up/down and is generally slow to respond.
It's the same for any website I have pinned to my taskbar.

The strange thing is, If I open up IE9 (non-pinned) and browse using the address bar everything is smooth and fast. Any ideas of why this is happening?



I've cleared my temp internet files and reset IE to default settings with no luck. I've also tried un-pining then re-pinning website but it's still the same.
Is there a way I can clear the cache for individual pinned sites?

Bump.

OK, After some more time with this problem I've worked a few things out,

Internet explorer (64bit) is working but it's the 32bit that's giving me trouble.
I've tried the following,

• Winsock reset
• Run with no add-ons
• Reinstalled ie9
• Reset ie9 settings
• Uninstalled Flash/Java
• Turned off security/firewall
• Removed as much third party software as I can

Also, ie9 (x32) runs fine when I run as admin.

Any help?