Sorry about the link. I just made a link from the same text that was posted, as a "how to do it" without trying to make it real.
My IE gives me a page not found, but doesn't lock up on the link. (I usually "open in new window" for suspicious things like that.) Perhaps you're short enough on RAM that you're getting some memory overwrite. That seems to be the most common cause of program locks.
The 'cat does occasionally try to hang when there's traffic going in and out. I've suspected that my long delays on page loading may have something to do with changing pages while a post is in process, and IE is "unresponsive" during the delays. I usually find that the "Stop" button - the red "X" toward the left on the IE toolbar - will unlock things, although it may leave you unconnected in hyperspace. Once the "hang" is resolved, the Back button usually (not always) gets back to the real world - such as it is. Your mileage may vary, of course.