Problem uploading profile picture

At least for me the upload of pictures is not working yet. I get the message

Sorry, there was an error uploading that file. Please try again.

Apart from that I think pictures to illustrate something should never be added externally (like Google or any other hosting service), always by adding them directly to the forum because they get lost if the link doesn’t work anymore. Is it possible to somehow detect this or at least give a strong hint in the yellow box appearing next to the new topic text editor as soon as the upload is working again?