The feedback and bug reporting interface that Last.fm is using during its beta for the redesigned site provides a simple way to report problems and tell the company what you like. During the beta, a temporary, persistent yellow navigation bar is placed at the top of the page with links to info about the beta program, notices for known issues, and an option to leave feedback. Clicking leave feedback expands the yellow bar to show feedback options.

1. The beta program navigation bar.
2. Clicking "Leave Feedback" link expands bar to show positive and negative feedback or bug reporting options.
3. Clicking "I Like This Page" allows users to enter a positive comment with their message.
4. Clicking "I Don't Like This Page" allows users to enter a negative comment with their message.
5. Clicking "Bug/Other Feedback" allows users to descibe bug or leave other feedback.

http://beta.last.fm/home