YES! Finally I have been looking for a fix to this bug for ages. Was causing me major stress. I was convinced it was to do with my apache configuration. I tried two different installations using WAMP and XAMPP but to no effect. I also noticed the issue occurs depending on the length of your HTML code. If I was to remove a few Includes then the whole site would start working again. As soon as it goes over a certain length it would switch the transfer encoding to chunked and those random characters would appear at the top and bottom of the html code and break the entire structure. Thanks for the fix it is much appreciated!
Bumping this thread again because I'm not sure that the SS guys realise that this is borking their own website. I've attached a screenshot of what silverstripe.com looks like for me on the open ticket here: