I just upgraded from 6.30 to 6.34. Everything seemed to go OK, but now I keep getting an error saying that the connection to the server was reset while the page was loading. I can't even get to the site maintenance page to put the site back online. Is this likely to be a Drupal problem or something with the hosting provider? Any help would be much appreciated.

Edit: Turns out that my .htaccess file was overwritten sometime during the upgrade (probably by me). The new one had a couple of differences, but mainly, the "RewriteBase /" line was commented out. Replacing it with a copy from a backup fixed the problem.