When writing my Local proxies with IE7 – Solved post, Windows Live Writer helpfully turned http://localhost:xyz/ into a link for me. Unfortunately, this resulted in my WordPress page throwing JS errors on every load.
It turns out that the invalid port number breaks the IE7 DOM, and the WordPress devs (who replied within about 4 hours!) haven’t been able to find a way around the condition.
I have posted a test case here:
Annoylingly the Microsoft Connect site for IE7 is closed. I’ve emailed a link to the test case to the IE team via their blog, but if anybody knows of a better way I’d be keen to know.