Preview doesn't work + comment couldn't be saved

Hi,

I am using Comment Upload module with Drupal 6.19.
I discovered the following problem:
When the module is enabled the preview and safe function on comments does not work. If a user wants to add a comment there is only the preview button shown (no matter if preview is optional or not). And when clicking the preview button the page is simply reloaded without showing a preview or the save button.

When I disable the module all works well (again).
I searched the site and googled and it seems that I am not the only one having this problem. But I couldn't find a solution other than disabling the module which is not really a "solution" as I want my users being able to upload files on comments.

So if anybody knows a real solution to this problem I would be very thankful for a link, hint, tip or anything else!

Gunther