Actually, this perplexed me since 4:45pm today after I installed the update. The trackball and buttons just refused to light up at ALL for me, and I couldn't figure out wtf was happening. Then it hit me to just try something for shits and giggles. I covered the light sensor with my thumb. HOLY EFF--- the trackball and buttons lit up. I took my thumb off, OH MY GOD WHAT THE-- they turned back off. This also applies to when you're playing a video, or looking at pictures, or even playing a game or browsing the web. I think honestly, it was better off before, but this works as well.