I recently upgraded from 1.9 to 2.0.7. Now, when anyone (admin / student etc) tries to 'add a new discussion topic' to the forum, they are able to type in their new message, but when they click the 'Post to forum' button, it goes to 'page not found / HTTP 404 - File not found ' (with the url being '/forum/post.php')
The strange thing is, that replies to an existing forum post made by clicking 'reply' work just fine.
How can I fix this? I have checked my server and the file /forum/post.php is definitely there! I even tried reuploaded that file to see if it had become corrupted or something, but that didn't help...
Please help!!
p.s - I turned debugging on and there were no onscreen error messages