Pretty Nice. Couple of small issues I noticed: If you try to save an empty Paste you get a server error. Also, The Save Icon itself feels very 1990s to me, you might want to consider trying out a few others.
Hi, Paste.pm's designer here. I thought that same thing about using the floppy disk icon as a metaphor for "saving" things, I really wanted to use any other icon to represent that because I also had that feel of 1990s. But after some research, I arrived at the conclusion that the very much hated floppy disk icon is also the most representative one for this action.