Apple has started a replacement program to fix MacBooks whose rubber surface is separating from the bottom case. The program covers MacBooks shipped between October 2009 and April 2011 that are exhibiting the problem. You can take an affected MacBook to an Apple Retail Store or Apple Authorized Service Provider to be fixed, or order a replacement kit online and do the work yourself. follow link
Arrange Icons on the iPhone/iPod touch Home Screens
Unhappy with the arrangement of your icons? You can move them around as follows: First, hold down on any Home screen icon until all the icons wiggle. Now, drag the icons to their desired locations (drag left or right to get to other screens). Finally, press the physical Home button on your device. (Unlike earlier releases, iPhone Software 2.1 doesn't move just-updated apps to the end of your Home screens, so your icons should be more stationary once you've installed the update.)
Remember that you can replace Apple's default icons in the four persistent spots at the bottom of the screen with your four most-used apps!
MacBook Bottom Case Replacement Program