Well, maybe I was not fully right with all suspicions, but at last I found the bug. It IS in Javascript code, and not only. 1. MSFN site uses iepngfix script for Internet Explorer 6, and this script requires to put blank.gif somewhere on the MSFN server. The file should be in path http:// www.msfn.org/public/style_images/bingo/blank.gif ...but it is missing. The script works for every png file used as a button or icon on every MSFN page, so it is called even hundred times for a single web page. With every call the browser connects to the web site and tries to download missing file. Now imagine hundreds of calls instead of a single one. And it is not the worst - click on the link above and you can see what is really going on. 2. MSFN redirects every missing link to the main page (why? what for?), so every call ends with index.php (index.html) downloaded, 50 KB for every call. Now you can count 100 * 50 KB = 5 MB in HTML instead of 49 bytes in blank.gif. With JS switched off IE6 ignores iepngfix and downloads only requested files. No wonder that MSFN site's and MSFN users' computers are overloaded. Look at the counter on the MSFN main page - it probably counts every guest using IE6 many times (the more threads or posts per page, the more hits counted per single user). In the end: another missing feature - I cannot find how to change date/time format setting, I can see only timezone change in User Control Panel.