Seems that a lot of vBulletin forums are having this same issue.
Almost every time you open a page, the browser stops, and after a delay, you get an "unresponsive script" message, and it presents options to continue, debug, or stop the script.
It appears to come from an advertising-related company called VigLink.
The fix seems to be simply to opt out of it. This site is working since I did so, although that was only a few minutes ago, and it doesn't seem that there are any side effects.
Clicky here and press the button: http://www.viglink.com/opt-out/
Almost every time you open a page, the browser stops, and after a delay, you get an "unresponsive script" message, and it presents options to continue, debug, or stop the script.
It appears to come from an advertising-related company called VigLink.
The fix seems to be simply to opt out of it. This site is working since I did so, although that was only a few minutes ago, and it doesn't seem that there are any side effects.
Clicky here and press the button: http://www.viglink.com/opt-out/