Unable to view images uploaded to server

I have uploaded two screenshots for use in a problem to do with a wordpress template I am using. The images have been uploaded through the use of wordpress' media library and are listed in my sites public directory:

/public_html/wp-content/uploads/2012/04/bs01.png

However when they are added to a page they do not display and when I try to link to them directly they do not load. The direct link I am trying to use is:
http:

//www.bored-student.com/wp-content/uploads/2012/04/bs01.png

I get the error:

"Forbidden
You don't have permission to access /wp-content/uploads/2012/04/bs01.png on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request."

All folders are set to 0755 permission and the image itself is set to 0644. I have messed around with the permissions to try and make the site more secure, are they wrong?