I'm new to the site/forum, d I've been trying yo update my profile with a picture.
Everytime I try it I got this message:

The selected file /tmp/shadoweaver_DEprofile_6.jpg could not be uploaded, because the destination sites/default/files/pictures/picture-2519.jpg is not properly configured.
Failed to upload the picture image; the pictures directory doesn't exist or is not writable.

It looks like a server problem, but I couldn't find any link/person to report this problem.

Can anyone give me some help?

Thanks.