[TYPO3] problems with an URL that doesn't have a trailing '/'

[Bing Du]

Hi,

Typo3 4.0.6

We created a page (http://siteA.some.edu/impact) which was of external url
type that pointed to another page on another site
(http://siteB.some.edu/somepage).

We've heard complains from some people that http://siteA.some.edu/impact
doesn't work in Internet Explorer in some cases unless '/' is added at the
end of the URL.  They were taken to the empty typo3 page /impact but not
redirected on from there.  Anybody ever run into the issue like that?  I
don't have any problems with http://siteA.some.edu/impact in all the
browses I have.

Thanks in advance,

Bing