Avatar not showing : Wrong path to image!

Hi,

When uploading an Avatar to a Blog, I can see and Crop the image correctly. After cropping, I don't see the image in the back-end and the image doesn't appear on the front-end of the site :
http://monblogchien.com/blogs/

The img scr isn't correct I think :
src="http://monblogchien.com/avatar/blog-13-32.png"