I'd test it myself to identify it positively as a site problem with the browsers I have on-hand, but I don't know of any way of getting that amount of data from the site except by waiting a week or four without clicking the "I've seen all of these" button on Newest Nodes.
If a proxy server was involved, and the proxy server was cutting you off at X bytes, it would be consistent with the messages/behavior you are seeing, which was why I asked. Some people do not realize they even have a proxy server set up, if it's transparent or automatically configured.
Perhaps somebody else that has chosen to allow their Newest Nodes page to grow so large can offer to test...?
