Písmená naviac v IE

Kód:

<style>
.vonkajsi {
float: left;
border: 1px dashed red;
}
.vnutorni {
width: 250px;
border: 1px dashed green;
}
.nadpis {
float: left;
width: 250px;
border: 1px dashed black;
background-color: yellow;
}
.menu {
float: left;
}
</style>
<div class="vonkajsi">
<div class="vnutorni">
<div class="nadpis">
Menu <!-- Nadpis menu v lavom stlpceku -->
</div><!-- END nadpis -->
<!-- MENU -->
<div class="menu">
Lorem ipsum dolor sit amet
Consectetuer sapien ac fringilla ipsum
Cursus dolor sollicitudin tellus hac
Justo vitae et Aliquam mollis
Quis Vestibulum Vestibulum in Sed
Nulla nec vitae id Sed
Sit at venenatis ligula magnis
Lacinia collis ante Susisse semper mea
Nulla Curabitur Duis quis tellus
Nibh nibh Curabitur eu a
Nulla Curabitur Duis quis tellus
Nec ipsum Nulla sagittis et
Ac eu tempor nulla pede
Sit at venenatis ligula magnis
Lacinia convallis ante Suspendisse semper
Nulla Curabitur Duis quis tellus
Nibh nibh Curabitur eu a
Nec ipsum Nulla sagittis et
Ac eu tempor nulla pede
Consectetuer risus vitae metus consectetuer
Porta Curabitur at pharetra sagittis
</div><!-- END menu -->

</div><!-- END vnutorny -->
<div style="clear: both;">copyright</div> <!--copyright -->
</div><!-- END vonkajsi -->


Problém:
V IE sa za koncom menu("Porta Curabitur at pharetra sagittis") objavia naviac 2 písmená: "is"

Kde je chyba a ako ju vyriešiť?