I think i was getting same thing, found the post:

http://groups-beta.google.com/group/comp.lang.ruby/browse_frm/thread/cbeb369da375a554/403af0ea585423ba?q=webfetcher+group:comp.lang.ruby&rnum=1&hl=en#403af0ea585423ba

anoth theory: my ISP's throttling/filtering me back.