Added a support comment, and updated spacing

As discussed in #1597.
Hmmm. From the description it was referring to [this bug](http://support.microsoft.com/kb/938301) which only occurs in IE7. The aliasing of `window.location` via a `<form name=location>` wasn't even thing I thought about from that comment. Since that currently doesn't break I don't think we can pull this patch out anywhere, including master where I had updated the comment recently. Ugh.