CI won't load... WHY???

[eluser]appleifreak[/eluser]
Okay, so I am going along coding and suddenly out of the blue CI refuses to load a page and my browser just gets the "Waiting for example.com..." thing and doesn't load the page. Why???? I check the error logs and it gives me a "[Wed Jun 03 13:38:17 2009] [error] [client XX.XXX.XX.XX] Premature end of script headers: php5". What? What does that even mean? Whats really weird is that if I switch to my local server, it works just fine. Why is that?

Really Really Really Frustrated,
appleifreak