Tables with span* break in responsive/fluid layout (BS 2.1+)

Created by: jschr

http://fiddle.jshell.net/jschr/NyaF6/5/show/

Resize the browser and which point you should see the table break out of the container because of the following rules in tables.less

// Change the column widths to account for td/th padding
.table {
  .span1     { .tableColumns(1); }
  .span2     { .tableColumns(2); }
  .span3     { .tableColumns(3); }
      ...
}

This had previously been working prior to 2.1. Can the above selectors be changed to td.span* as the comment seems to imply that they're only required for table cells?

Thanks