1. choose 2nd panel then choose 1st panel, then energy level diagram slider erroneously moves up
    >>Could not reproduce this bug in 4.04.04-4.04.06 in either Java 1.4 or Java 1.6

2. First try to improve performance in 2nd panel, e.g. in case of no photons.  <1hr for analysis
    >>Most of the unnecessary computation time is taken up in phetgraphics execution.
    >>No easy fix for this.  Best long term fix is piccolo.

3. Photons are going behind lamp control, can they go in front?
    >>Very difficult given the current implementation

4. Fixed: "Laser blew up" message erroneously stays in front.  Simulation is reset when the user changes a beam rate.
    >>Perhaps it would be appropriate to pause the simulation, then put up a dialog in which the user has to press "reset", because the current solution of resetting the simulation when the user changes the lamp emission rate may confuse users (who don’t realize that other things e.g. lifetimes have been reset).
    >>Would be relatively difficult to allow user to move directly to interacting with lamp controls without doing a reset

5. Illegal argument exception on creating transparent photons
    >>Couldn't reproduce this