Since I started having friends on DN, every message I send or receive has a red cross in the top right hand corner, even when I download a wallpaper and leave a message. Please help me. Thanks.

No problem. Everyone has those by comments they make in case you want to delete it if you made a mistake, spelling error in it or put it on the wrong profile etc. Only the person making the comment can delete it. Everyone can delete their own... On your own profile you can delete comments and cards from others if you need to. I have done that a few times if I receive two identical messages by the same person or a note that I did not like from someone. It is a good thing ♥♥♥
Cherie