Notifications: Image as a Link

[youradhere4222]

So... I made an image to put in my notifications as a link to join:



Here's the code in my notifications area:

<center><a href="http://discussobama.com/community/register.php"><img src="http://discussobama.com/community/images/join_today.png"></a></center>

For some reason there's a blue border around the image. I made the background color the same as the notification box so it would fit in seamlessly.

Is there anyway to fix this? It looks like it's taking the link color from my forum names and putting it around the image, but I've seen it done without this, and my only question is how do I get rid of it?