Has anyone noticed that when you have a ton of apps running, and you continuously tap the "x" to close out of them, the iPhone freezes even though the icons keep wiggling. It takes the phone about 2 minutes to unfreeze, or I have to restart it. This doesn't only happen if you have a ton of apps running, sometimes it happens randomly when closing out of just one app. It happened on my 3GS and happens on my iPhone 4. Software bug? Anyone else having this issue?