ui list archive problem

I was just looking over the ui list's archives, and clicked in my RSS feed
on
http://discuss.squeakfoundation.org/cgi-bin/ezmlm-browse?list=ui&cmd=showmsg&msgnum=81 -
but I can't view that page because (scrolling down a web-based Python
stacktrace)

IOError: [Errno 2] No such file or directory:
'/home/discuss/lists/ui/archive/subjects/ci/plkfakdfodedgkdcoh'

I've attached the HTML source for the stacktrace.

frank