Google changed the HTTP network code implementation for their Chrome 2 beta browser for windows, so it's probably why you're having problem with the version 2 pre-beta and not the version 1 Final
Release Notes 22.214.171.124 ‚€Ž(Chromium Developer Documentation‚€Ž)
New network code. Google Chrome now has its own implementation of the HTTP network protocol (we were using the WinHTTP library on Windows, but need common code for Mac and Linux). We fixed a few bugs in HTTP authentication and made Google Chrome more compatible with servers that reply with invalid HTTP responses. We need feedback on anything that's currently broken, particularly with proxy servers, secure (https) sites, and sites that require log in.