I am running B2EVO 2.4.5 on a windows server and users commenting on my blog receive a 400 bad request error. Their comments do later appear on the blog but not without seeing the error screen.
Thanks, that had the solution I needed. I opted to use the Blondes solution and the code snipet is, however, located in the _template.funcs.php file as mentioned by a later post.
Welcome to the forums.
See if this helps http://forums.b2evolution.net/viewtopic.php?t=15152