Stackideas

Here is a strange behavior seen with IE with component Easydiscuss.
During the drafting of a discussion in the forum, the two buttons to send or withdraw the contribution become inactive in the following case:
- I check the box "Poll"
- I added a first proposal, then a second, then a third ...
in all cases, the content under shifts down to make way for new fields)
- The submit buttons or neglect are placed too low and then they are no longer clickable (fields down, but not the rest of the site)

Do you know where does this problem?
Thank you in advance.

PS: you will find a screenshot of the behavior (see below) and the error IE :

Détails de l’erreur de la page Web

Agent utilisateur : Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; .NET CLR 1.0.3705; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.04506.648; .NET CLR 3.5.21022; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)
Horodateur : Thu, 31 May 2012 15:44:56 UTC


Message : Cet objet ne gère pas cette propriété ou cette méthode
Ligne : 67
Caractère : 6
Code : 0
URI : http://www.comonline.groupama.com/media/com_easydiscuss/js/dev/easydiscuss.discuss.js