I found the problem. Take a look at the code below. Min-height got changed to 1px somehow. Do you know what the default setting is?
.span1, .span2, .span3, .span4, .span5, .span6, .span7, .span8, .span9, .span10, .span11, .col2-set .col-1, .col2-set .col-2, .col-ss-1, .col-ss-2, .col-ss-3, .col-ss-4, .col-ss-5, .col-ss-6, .col-ss-7, .col-ss-8, .col-ss-9, .col-ss-10, .col-ss-11, .col-ss-12, .col-xs-1, .col-xs-2, .col-xs-3, .col-xs-4, .col-xs-5, .col-xs-6, .col-xs-7, .col-xs-8, .col-xs-9, .col-xs-10, .col-xs-11, .col-xs-12, .col-sm-1, .col-sm-2, .col-sm-3, .col-sm-4, .col-sm-5, .col-sm-6, .col-sm-7, .col-sm-8, .col-sm-9, .col-sm-10, .col-sm-11, .col-sm-12, .col-md-1, .col-md-2, .col-md-3, .col-md-4, .col-md-5, .col-md-6, .col-md-7, .col-md-8, .col-md-9, .col-md-10, .col-md-11, .col-md-12, .col-lg-1, .col-lg-2, .col-lg-3, .col-lg-4, .col-lg-5, .col-lg-6, .col-lg-7, .col-lg-8, .col-lg-9, .col-lg-10, .col-lg-11, .col-lg-12, .col-lg-25, .col-md-25, .col-sm-25, .col-xm-25 {
position: relative;
min-height: 1px;
padding-left: 15px;
padding-right: 15px;
}
