Create stuff into dogs
 

On our forum if someone uses the word "create" followed by the word "into", they are not able to post.

The post could be something as simple as "create stuff into dogs". But it won't post. Instead, they receive the following error message:

Does anyone have any idea what might be causing this apparent bug?

An internal server error is most like caused by incorrect htaccess settings, permissions and or ownership, but to verify that, you need to check your apache logs.