An note on proxy servers: Some ISPs route their HTTP traffic (all the web stuff...) via a proxy server, meaning that everything one subscriber downloads will be cached for a certain amount of time. Now when another subscriber requestst the file or page, it's delivered from the cache, which is great, because the user gets a faster download, and CL and the ISP save bandwidth. Problems start, when the original download to the proxy was corrupted. Then you can download the file over and over again, it'll stay corrupted until the proxy cache expires. As this matches pretty well with the user experience we've been seeing here, we wanted to get that particular information. That is only one possible explanation, though.