g1smd - 7:14 am on Sep 27, 2011 (gmt 0)
Yes. I tried redirecting for several months. The requests for the wrong URL version continued several times per day.
For the last month or two I have been rewriting the request to a static XML file with one message in it "Please unsubscribe from this feed and resubscribe using the URL version without amp; in it". The requests continue and the subscriber number remains static.
I also tried something else for about one month in between those two, but can't remember what it was.