I don't know if it's always like that, but recently I noticed that whenever I open my site (managed with Drupal 6) from Lynx, it always gives HTTP error 406. The pages still load fine though, so it's more an annoying unconvenience instead of critical error.
On w3.org, 406 error defined as:
The resource identified by the request is only capable of generating response entities which have content characteristics not acceptable according to the accept headers sent in the request.
Whatever that means :|
I tried googling for solution. Some recommend to turn off mod_security by putting these lines on .htaccess
<IfModule mod_security.c>
SecFilterEngine Off
</IfModule>
Nope, not working. Some recommend to get rid off xmlrpc.php altogether. Still not working.
I'm still figuring out what to do. May be upgrading to Drupal 7 or replace it with other CMS?