Originally Posted by downeaststudio
Mine does that too occasionally. It usually means that there are too many background programs running. Try installing a task killer and something like fast reboot. Run those regularly and you should see a difference.
I am learning that the more advanced that the Android platforms are becoming the more like desktop PCs they are becoming... Which means that we are soon going to have to use utilities for defragmenting, etc...
Do NOT use task killers. They are a throwback to the very early days of Android. Very rarely do apps need to be killed any more. There are many informative articles spread across all of the internets on this topic. Do yourself a favor and always research any advice you are given. This will help you in making an informed decision.