Thanks ! for the welcome and the advise !If you can't see any hot pixels then you should not worry about them! If you really want to test for them then wait for the dark days of December and then record some video of ghosts in a dungeon by candle light - that normally shows up one or two
I'm not sure what the difference between 1.4b and 1.4 is, probably very little, I'm also not sure which is best, maybe it is just to distinguish between factory and user install. Without further information I would keep what you have and enjoy it until 1.5 arrives.
I'll do that, wait the next release as this one seems good for now.
Have a nice week end to all!