My keyboard pops up and then goes right back down not allowing me to type anything in. I try to touch a single letter and it just doesn't do anything. Since i have updated to ios 4.2.1 my keyboard won't work with several websites. The one I am having the most trouble with is the expense system called concur at work. The keyboard just pops up and disappears again. Many of my coworkers are having the same problems. Any advice?