Changes are imminent – problem is that sometimes the original method was preferable to the new “improved” one. Take the new iPad, for example. When you wanted to lock the screen’s orientation on pre-iOS 4.2 versions, all you had to do was flip a switch.
The new method is a little more convoluted. So, here’s how you lock your iPad’s screen orientation:
First, double-click the home button on the front of the iPad. This will bring up the program bar at the bottom of the screen.
Now, simply slide the program bar to the right, and on the resulting screen, press the lock button. Make sure you’re holding your iPad in the position you want to lock your screen in before you press. Portrait or landscape.
Not as good as the old method, but useful none-the-less.