Accessibility problem

Hi,
I use Chronoforms 4.0 RC3.5.2 with Joomla 2.5.14.
I have checked the accessibility (with IDI Web Accessibility Checker) of a contact form with a chrono security question.
Just an error found :

1.1 Text Alternatives: Provide text alternatives for any non-text content

Success Criteria 1.1.1 Non-text Content (A)

Check 238: input element has alt attribute.
Repair: Remove the alt attribute from all input elements except those with a type attribute value of "image".
Error Line 203, Column 77:

<input type="hidden" alt="ghost" name="cf_sid" value="c2e0be57715bebea7fb5e6aadc802da1" />

Please, could you tell me if I can repair this error and where ?
Many Thanks

Hi La Pache,

This is added in this file
/administrator/components/com_chronoforms/helpers/html_helper.php

I saw four instances in there. I'm not sure if ChronoForms uses these alt values anywhere else though so you may possibly get some side-effects if you remove them.

Bob