materio-base-d7/themes/seven/ie.css

/* IE7 renders legends in nested fieldsets without a width. */
fieldset legend {
  height: 1%;
}

/* IE renders absolute positioned legend where fieldset content starts. */
fieldset .fieldset-legend {
  left: 0;
  top: 0;
}

/* IE renders monospace font too big. */
code,
pre,
kbd {
  font-size: 1em;
}