I've just heard of this recently. I believe I know where the problem lies and how to fix it. I plan to include it in the next update (If it's more complicated it might not make it to the next one, but I will address it). I'm thinking I might enable it but make it a manual switch only. So in dock mode, or if the keyboard is pulled out, it's landscape, otherwise it's portrait. And maybe add a custom slider action or menu item to manually switch too. Rotation on Android is pretty slow, and it can easily lead to the application existing twice in memory. And for WidgetLocker, which some people will load with lots of widgets that have large images, that can cause it to hit the application's memory limit.