Sometimes home button does not respond to single click

[Bandolier]

It's 100% a software issue. This happens only once every two or three days. I know it's a software issue because it will respond to double clicking to bring up fast app switcher. But I am basically stuck in the app I left the phone in because I can't single click back to the home screen. I can usually figure out things like this, but it's got me baffled. Also, respringing will fix it but I want to know what's causing this in the first place.

iPhone 4, jailbroken, 4.0.1

 

[Applejuiced]

You're good at figuring things out?
Thats a good joke.
Its a hardware issue.

 

[watercrawl]

Mine has been doing this too. I took it in to the Genius Bar and the guy told me to Restore it at home and he was 99% sure it would resolve it. It didn't, so I'm not sure it's a software issue. I hate to exchange my phone as I about $40 worth of screen protectors and Zagg Skins on it that I don't want to have to replace.