A Variety of Glitches in my Iphone Any clues on Any of them?

Question

• A Sudden drop in brightness level that only restarting seems to fix. It will just drop to 15% of Normal Brightness for no reason. (about Once a day, about 15 times total)
• The Camera Shutter works Very Slowly sometimes for no reason at all. I push to click, then the shutter goes into a Slowmotion movement and seems to freeze with the fins in the "Snap Image, Closed fins over Screen Position". It can freeze for a second or two. Stops you from taking another "Fast Shot". (About every 5th Picture or 7 times a day)
• The Iphone seems to get quite HOT when Playing "Defend Your Castle". I'm playing at the high levels. Could an App make the Phone heat up?
• The Iphone periodically vibrates for no special reason. Mostly like short pulses. Not a big glitch, just odd ( 5 times a day)
•The Iphone mute button is too easily pushed BY YOUR EARLOBE) when you have the phone against your ear listening to a conversation.
• About three times since I've had this replacement (About 2.5 weeks). The phone has simply gone dead and shut off during a call. It turns right back on and works.
•The Orientation of the phone is off. If i start the Ibeer App or the Level app, the iphone thinks that "straight up" is around the 1 or 2 o'clock position. Is there a way to calibrate the whole phone? Not just the Level App?
•About once a day the keyboard freezes with a Letter in the Up Postion. When you Push the keys and that "Flag" letter Pops up ( Especially the letter "C"). I need to restart Safari to get the keyboard to work again ( Sometimes I need to re-boot the phone for the keyboard to work again).

Answer 1

If you have tried the basics from the manual:
Restart
Reset
Restore
Then it may be time for another visit to the genius bar.
For one thing, the mute button should not be available when the iphone is against your ear. The proximity sensors shut the screen off when it is close to your head.
http://manuals.info.apple.com/enUS/iPhone_UserGuide.pdf