Valueclick medium rectangle slows down my site

Hi.
Am wondering if any of you are experiencing this:
1. Site loads to the point where it tries to load the medium rectangle, then stops on both IE7 and Firefox2.
2. Hit "Refresh" and everything then loads up fine.
The site is running WordPress 2.2.
It only started to happen recently. I’ve since taken it off because if it’s pissing me off, I’m sure it’s pissing off my readers. Though I’d like to put it back because it’s a good earner.
Thanks.

Original post by mooiness