Had to pull the battery on mine for the first time just now. It's the first morning since I installed the power kernel, I had it OC'd to 850Mhz. I got to the office and couldn't see the office wifi network (multiple routers running DD-WRT). I could see pretty much every other wifi network in the area. Tried deleting the AP and adding it again, still couldn't see it, so next I tried rebooting. N900 shut down and wouldn't start back up, it just acted completely dead. So after I pulled the battery I was able to start up. Still couldn't see the network though. So I went onto another network and reinstalled the stock kernel. Everything works OK again but I miss the speed...