That's a style conflict from your Joomla template. Do not turn off Bootstrap unless you've a compatible Bootstrap CSS file for CB to use or you will lose nearly 100% of CBs styling. The conflict is coming from the below.
Code:
.art-button.hover, .art-button:hover
{
background: #E2341D;
background: -webkit-linear-gradient(top, #B52A17 0, #DD331D 20%, #DD331D 80%, #B52A17 100%) no-repeat;
background: -moz-linear-gradient(top, #B52A17 0, #DD331D 20%, #DD331D 80%, #B52A17 100%) no-repeat;
background: -o-linear-gradient(top, #B52A17 0, #DD331D 20%, #DD331D 80%, #B52A17 100%) no-repeat;
background: -ms-linear-gradient(top, #B52A17 0, #DD331D 20%, #DD331D 80%, #B52A17 100%) no-repeat;
background: linear-gradient(to bottom, #B52A17 0, #DD331D 20%, #DD331D 80%, #B52A17 100%) no-repeat;
-svg-background: linear-gradient(top, #B52A17 0, #DD331D 20%, #DD331D 80%, #B52A17 100%) no-repeat;
-webkit-border-radius: 11px;
-moz-border-radius: 11px;
border-radius: 11px;
border-width: 0;
padding: 0 10px;
margin: 0 auto;
}
It looks like you modified the template and added that class to it or used jQuery to force the class onto the bottom. Either is fine, but you need to remove the Bootstrap button classes first or the 2 styles will conflict. So you need to remove the btn btn-default classes.
krileon
