by what you are saying its with ur script recheck it pls.same here, my index.php files are both giving 503's
however my admin.php website is still accessible.
(i custom built all my pages, and this is happening on test and live environments)
EDIT1: The most recent post on http://status.x10hosting.com/ is that an exploit was patched 10 hours ago, could this have been to do with it?
EDIT2: Now its happening randomly on pages that used to work, every 5 pageviews or so