I am asking this question a second time in hopes that some GENIUS can help me. I completely reinstalled MediaWiki 1.8.2 and it worked for all of 5 minutes before I started getting: ==================== 500 Server Error A misconfiguration on the server caused a hiccup.Check the server logs, fix the problem, then try again.URL: http://www.xxxxx.com/wiki/index.php?title=Main_Page ==================== Looking at the server log, I see the error: "Premature end of script headers: /home/xxxxx/public_html/wiki/index.php" Thanks to François, I looked at: http://thread.gmane.org/gmane.org.wikimedia.mediawiki/4024/focus=4100 http://httpd.apache.org/docs/1.3/misc/FAQ-F.html#premature-script-headers ....but neither was able to solve my problem. The host company has tried to help, but they are not experts with MediaWiki, so this think it's the software. However, given that thousands of people all over the world use the MediaWiki, I think it must be something else. Can anyone suggest ANY other thing I should look at or try? --Bruce