PLEASE REMEMBER TO CREDIT OTHERS WHEN YOU USE SOMETHING!
This does not only apply to graphics from this community, but for every other community you take stuff from too.
To credit a userpic, go to your "edit userpics" page and enter "created by <*lj user="USER/COMM. NAME">" in the comment box beside the userpic. Just remember remove the asterisk before "lj user".
There is also a better tutorial
here Do this even if the userpic was created by you. Other people don't know it's by you unless you tell them.
Anyone who does not credit properly will get a warning, and if it happens again, you will be banned.
I don't want to sound mean, but it's important that you respect everyone, even yourselves.