I have a 13" macbook that i bought in the summer of 2008, it freezes for maybe 10-30 seconds and then starts running again and then about a minute later it stops. I have plenty of space. but that pinwheel will pop up if I'm using any application. i can still move in between spaces and stuff but whatever program is running i really cant access. I can switch between tabs. Usually if im trying to write a text in a chat window (gchat/fbchat) it will say that it cant access the custom dictionary after it unfreezes, sometimes this will pop up if im trying to write in word too. If i am typing somethings and it freezes, if i keep on typing sometimes it will register what i wrote and all of the the words will pop up after it unfreezes. It is really annoying and i do not know what is wrong, ive owned this mac for two years and all of a sudden three days ago this problem popped up. Please someone help me!