Missing li styles in blocks

This is how link lists looks in content:

<div class="service-links">
<ul class="links">
<li class="service-links-facebook-like first">
<li class="service-links-google-plus-one">
<li class="service-links-facebook-share">
<li class="service-links-twitter-widget last">
</ul>
</div>

And in blocks:

<div class="service-links">
<div class="item-list">
<ul>
<li class="first">
<li>
<li>
<li class="last">
</ul>
</div>
</div>