Rated 5 out of 5 stars

I have the same error: No Background-color.
To fix this, go into your firefox-folder/extensions/pastebin.com@gmail.com/chrome/skin and open skin.css in a editor.

Add the background-tag to the css-style "#pastebin-panel"

Choose a color you like. Save, and restart firefox.
Works like a charm.
Thanks for this nice plugin... If i calculate the seconds i save every pastebin, it safe my day ;)

This review is for a previous version of the add-on (2.1.1-signed).