I'm having a very strange problem that I cannot understand.
I've downloaded WordPress 2.5, made a clean install, I've changed NO configuration at all, and the first thing I've tested was make a new post with title="test" and contents="test".
From the moment I click on "Publish", my blog stops working. FINITO! No homepage, no admin, nothing... I always get "500 internal server error".
I've deleted the database and run the install script again, and everything is back working. As soon as I click on "Publish" to make a new post, the problem returns and does not go away unless I drop all tables and re-run install script.
My PHP info: http://www.ptalojamento.com/info.php
The access logs when clicking "Publish":
220.127.116.11 - - [18/Apr/2008:09:43:59 +0100] "POST /wp-admin/post.php HTTP/1.1" 302 - "http://www.dicasinternet.com/wp-admin/post-new.php" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:18.104.22.168) Gecko/20080311 Firefox/22.214.171.124"
126.96.36.199 - - [18/Apr/2008:09:44:00 +0100] "GET /wp-admin/post-new.php?posted=3 HTTP/1.1" 404 - "http://www.dicasinternet.com/wp-admin/post-new.php" "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:188.8.131.52) Gecko/20080311 Firefox/184.108.40.206"
The error on the browser:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, email@example.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request