When I open an album in Picasa2, pause the slide show and attempt to go backward (i.e. from the first picture in the album to the last picture in the album) all I get is the Picasa logo. When I hit the reverse button a few more times, I still get the Picasa logo -- no pictures. Then when I hit the forward button, I get the last few pictures from the album. Seems like a bug.
Also, it would be nice to be able to pause without seeing the slide number displayed on the screen.
Not complaining, mind you.