I first notice this in the particle stream while you are selecting an object in edit mode.
Compare these two image in First Look and the other Main Grid. There is a big difference. The first look starts off looking the same but as you fly around for about 15 mins it ends up looking like this.
First Look: http://www.joe-brown.net/SecondLife/ParticleFirstLook.jpg
Main Grid: http://www.joe-brown.net/SecondLife/ParticleMainGrid.jpg
on the plus side of things Particle now render correctly in front of other Alpha textures