YOP Poll Pro : admin display issue

Hello,

I’m developping a website using the Pro version of YOP Poll.
I’ve already created a poll with multiple questions, that worked fine.
This morning, I’ve been managing some settings and CSS things in the admin panel of the plugn.

At a point, the admin panel started to have display problems (on the poll creation/edition screen) that make the plugin unusable. i see the main title field, but it seems that CSS problems make the rest displaying like chaos. The first tab with questions and answers doesn’t display at all and the save buttons are hiding far behind.

To see what it looks like, here is a screenshot of what I get : http://img4.hostingpics.net/pics/905179yoppolldisplayproblem.jpg

Thank you in advance,