My b2evolution Version: Not Entered

I have a problem with links to my gallery "changing" when I save a post. Before I save, the HTML source looks like this

<a title="Uppställd" href="http://gallery2.nordharna.se/index.php?dir=_Ludde/uppstalld">
<img alt="Uppställd" class="dirthumbnail" src="http://gallery2.nordharna.se/pictures/_Ludde/uppstalld/.thumbs/thumb_directory.jpg" /></a>

which is correct.

But when I check the source in my web browser, it looks like this

<a title="Uppställd" href="http://gallery2.nordharna.se/index.php?dir=_Ludde/uppstalld"><br />
<a href="http://gallery2.nordharna.se/pictures/_Ludde/uppstalld/.thumbs/thumb_directory.jpg" target="_blank"><img alt="Uppställd" class="dirthumbnail" src="http://gallery2.nordharna.se/pictures/_Ludde/uppstalld/.thumbs/thumb_directory.jpg" /></a></a>

which is not correct. Instead of being linked to a page in my gallery, the links is all of a sudden only to the image (click the image to see the same image... instead of what I want, click the image to see the large image in the gallery). An extra link is added

<a href="http://gallery2.nordharna.se/pictures/_Ludde/uppstalld/.thumbs/thumb_directory.jpg" target="_blank">

I've tried both with the FCKeditor (which I normally use) and without it. I have XHTML verification etc set to basic.

Why does this happen?