Only solution is, get another Hosting provider, this one is crap. It has a completely malfunctioning anti hotlink system , and in addition they are not capable of generating functional error pages:
Premature end of script headers: f403.php
This should produce some kind of 403 error page.
I had Trouble on 8 different browsers on different OS trying to load their homepage. After pressing the reload Button a few times the page only stayed functional on browsers set for most aggressive caching. I even had the feeling they block all Images that are requested a second time from same IP and maybe the even block certain browsers as it was impossible to call the page(whith images) from a linux konqueror.
From their tests via several proxy sites, everything is worked fine.
Most proxy servers tend to store pages in their own cache, so its a bad idea to test via a proxyserver as your second attempt loads the page from that proxy not from your own webspace.
A Hoster thats not capable of getting up a functional Homepage is simply unacceptable. And if they have the same problem on their own homepage its very likely that paid account will have it too.
Maybe you try one of those :
http://www.free-webhosts.com/php-hosting-comparison.phpThis is definitely not a WB issue!