Rated 5 out of 5 stars
I have the same error: No Background-color.
To fix this, go into your email@example.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 ;)