No problems like that with mine. Course, mine's not the white one. What kind of problem is it? I mean, does it do anything when it's not feeling up to it? Can you tell if it actually felt like it "pushed"? Mine's got a tactile, almost "click" like feel to it when I push it.
Tom (... strange....)
At the moment the main problem is with the home button, as the home button is the a main feature to operating the phone it means you can't use the phone until the home button wants to work.