When up-grading to last RSForm Pro our css is not working anymore as usual.

And cannot read anymore (:before as : after ) looks like the balise doesn't fit anymore :

Let have a look at or actual css samples as it works fine on our site'page ( with previous version of RSForm ) :

monbilansportsante.fr/index.php?option=c...formId=32&Itemid=758

Css sample :
.formResponsive [type="radio"] + label,
.formResponsive [type="checkbox"] + label {
position: relative;
display: inline-block;
padding-left: 1.5em;
}
.formResponsive [type="radio"] + label:before,
.formResponsive [type="checkbox"] + label:before {
content: '';
position: absolute;
left: 0;
top: 50%;
margin-top: -.4em;
width: .7em;
height: .7em;
border: solid 1px #F7A600;
-webkit-border-radius: .4em;
-moz-border-radius: .4em;
border-radius: .4em;
}
.formResponsive [type="checkbox"] + label:before {
-webkit-border-radius: .2em;
-moz-border-radius: .2em;
border-radius: .2em;
}
.formResponsive [type="radio"]:checked + label:before,
.formResponsive [type="checkbox"]:checked + label:before {
border-color: #555;
}
.formResponsive [type="radio"]:checked + label:after,
.formResponsive [type="checkbox"]:checked + label:after {
content: '\2714';
position: absolute;
left: .05em;
top: 50%;
margin-top: -.35em;
line-height: .5;
font-size: 1em;
font-weight: 400;
color: #555;

}



.formResponsive select {
line-height: 18px;
border-color: #F7A600;
margin-left: 8px;
margin-right: 8px;
}