I don't know if this problem plagues other Internet Explorer users, but have you ever noticed that you can "disable script debugging" in the Tools->Internet Options->Advanced menu as many times as you want, but it won't stick? Well I found the solution in Microsoft Knowledge Base Article 224926.
RESOLUTION
To resolve this issue, use the following steps:
1. Open Visual InterDev 6.0.
2. On the Tools menu, click Options.
3. Double-click Debugger to expand the branch, and then click General.
4. Under Script, click to clear the Attach to programs running on this machine check box.STATUS
This behavior is by design.
It does say IF you have Visual InterDev 6.0.installed. Are we supposed to install it then?
Ps, having to buy Visual InterDev 6.0 at $499.00 might be a bit of a bummer, then again its included in visual studio net. which isn't free either. a subscription is needed for that.