Error 500: WordPress Blog and Windows Live Writer
October 1, 2008
Problem: When trying to publish to a WordPress Blog, I get the following error:
The server reported an error with the following URL:
http://www.domain.com/xmlrpc.php
500 Internal Server Error
I looked around the Internet and saw that it was related to uploading pictures. Not very much out there regarding this issue. One suggestion was to take out any extra blank lines at the end of the xmlrpc.php document, which didn’t work. I tried reinstalling WordPress without any luck. Note: All of this began to happen after upgrading to version 2.6.1
Solution: Found a thread on the wordpress.org forum that had a suggestion to modify the .htaccess file with the following line:
AddType x-mapp-php5 .php
AddHandler x-mapp-php5 .php
Did that and all was well, thanks to DocShadow.
Links:
http://wordpress.org/support/topic/201264 (Where I found the solution)
Posted in 
February 2nd, 2009 at 3:37 am
Thanks! I had the same Problem and now it works very well!
February 6th, 2009 at 7:48 am
We had the same problem.
The .htaccess solution led to a server crash.
Our “solution” is the following. If in LiveWriter in File, Open we ask too many posts (50, 100) we get the above error. But when we request only 20 it works fine. A colleague of mine who could look at the server logs told me that when the error page is generated there are also a number of php memory errors generated.