CGFeedback gives error on bulk action

[demafkees]

Hello everyone,

On one of our customers website we use the CGFeedback module to enable visitors to comment on, for instance, newsitems (example: http://www.zigt.nl/news/1650/76/Nieuw-M ... nds-Glorie. Click on "Reageren" to see the form).
However, even with the captcha module installed, they receive a lot of spam messages. The only captcha library that seems to be doing its job at this point is the recaptcha, but as you can see that one is way too big for the div it's in.
I selected all comments in the CGFeedback module, scrolled down, selected "Mark as Spam" and got the following error:
"A required parameter is missing".
The number of comments selected is 842. When I select less comments (the highest amount I have tried without getting an error was 100) it seems to work fine.

The website is running on 1.10.3 and the module version is 1.5.4.

Thanks in advance for your response.