I just upgraded to Lucid (Ubuntu 10.04), and I reinstalled Shutter. I had found it not too long ago, and it does a great job with screenshots. One of my favorite features is the way you can edit the screenshots and draw circles to point out things in the shot. It’s great for documentation.
Problem is, in Ubuntu 10.04, the Edit button is disabled. I found this bug post: Editing disabled in Ubuntu Lucid.
Solution: install the package: libgoo-canvas-perl
It was that easy, and now it is working like a charm!