[raminia+]

Yeah! I bet you are not using popup comments. and there is something wrong in 1.4.3 release! the main point for 1.4.3 release was to stop that comment spams BUT I don't know how but the released version does not have that for non-popup comments!!!

To fix dload the attachment which is index.zip and it contains index.php file. repleace it with the current main index.php of your 1.4.3 install.

EDIT:
THIS BUG IS FIXED NOW ON THE OFFICIAL RELEASE OF 1.4.3. IF YOU DOWNLOAD IT FROM NOW ON, YOU DON'T NEED TO DOWNLOAD THE ATTACHED INDEX.PHP.