[support] Internal Server Error

[Daniel Carrera]

Hello,

I have a strange problem. When a user tries to create an account on my 
Drupal site he always gets an "Internal Server Error":

====
Internal Server Error

The server encountered an internal error or misconfiguration and was 
unable to complete your request. Please contact the server administrator 
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.
====

Strangely, I cannot reproduce the error. Neither can my coworkers in the 
UK. It seems to be local to the user. Can a bad Internet connection 
cause an internal server error? More strangely, the Drupal account *is* 
created, in spite of the error.

I looked at the server log (/var/log/httpd/error_log) and found this:

[Thu Feb 11 08:33:43 2010] [error] [client 62.24.97.244] malformed 
header from script. Bad header=/home/admin/dead.letter... Sav: 
php-script, referer: http://theingots.org/community/user/register


Can anyone decipher what this is saying? You can see the entire error 
log on pastebin:

http://pastebin.com/m6e7f6af4


Daniel.