After attempting to upgrade to the newest version of WP on this site: http://modelingbyanatomy.net
I received the error notification: "Briefly unavailable for scheduled maintenance. Check back in a minute."
After searching the forum for a solution, I found the fantastic advice of: "delete the .maintenance file".
Now that I've done that, I receive a notice stating: "HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request."
Fantastic! Any advice now? While deleting and re-uploading everything is possible, there are multiple blog entries that cannot be saved. The idea of losing those is pretty unacceptable so any advice that doesn't involve deleting everything and starting over again is more than welcome.