I came into this and solved it. It is obvious and easy, but some of you might find it a huge problem. It usually happens when a div has a background image.

So, when you have a link of this type:

<div class="item" style="background-image: url(images/slider/bg1.jpg);">

You must change it to:

<div class="item" style="background-image: url(<?php echo $this->getThemePath() ?>/images/slider/bg1.jpg);">

You are using <?php echo $this instead of <?=$view

:)