I tested !JoomlaComment v3.26 with my Joomla! 1.0.15 installation today. My testing website is in Chinese language and utf-8 encoding.

I had enabled AJAX in the backend of this component.

When posting new comment in Chinese language, there will pop-up an window and show me following error message:

There are Invalid characters in the message.

I checked what it shows and found this component can't handle Chinese punctuation and line wrap properly.

Though there is an error message, in fact the comment was submited and published. But these are some characters can't be shown correctly inside the published comment.

Please fix this.

Thanks.