1) What button you were trying to click when you ran into the unexpected behavior.  What happened?
A: After moving videos down to the editing pane, clicking on the 'trim', 'rotate' and 'effects' buttons has no effect.

2) When did this begin happening?
A: Today, which was my first experience using YouTube Video Editor.

3) Your browser and version number (e.g. Chrome 10.3.181)--this can usually be found in a section such as "about" in your browser
A: Firefox 5.0; Google Chrome 12.0.742.112; IE 9.0.8112.16421