I was working away here and suddenly my the root url of my blog, e.g. http://myblog.mysite.com no longer works. It's just a completely blank, white page. No error message, nothing.
If I go to a page or a post or category url, e.g. http://myblog.mysite.com?p=5, it works no problem. Everything works except index.php.
I can't figure this out. Please help!