Some sites hosted on acs-webhosting.com may have discovered their front page missing off their blogsite.  Don’t worry - your blog hasn’t gone missing and you can still log in via the wp-admin page.  I’ve notified the web server support and they are investigating it and hopefully should be resolved soon.  My apologies for the inconvenience.

Addendum:  I’ve had a response and it appears that the apache is incorrectly serving the index.htm page for viewing rather than the index.php so I’m manually removing the .htm page off the affected sites while they investigate the cause.