Sometimes my display darkens right down.

It is not on automatic I have it set at about three quatrers up the bar when it goes it is sometiimes hard to go through to applications and display due to not being able to see display due to darkness. The battery is not always low when this happens! Any ideas ?

Thanks

You could try turning off the Power Saving Mode (Menu > Settings > Display) to see if that makes a difference ?

One other thing (depending on firmware version) - if you place your finger at the top, as if you were going to pull down the notification bar, but slide it to the left or right instead, it alters the brightness. Any chance you are doing this unknowingly ?