itunes 11.0.4 causes store to freeze or delay

Since updating to iTunes 11.0.4 I am having trouble with the store. If I browse for songs and click play to hear the sample, I either can't pause or there is a really long delay before it responds to the command to pause. When this happens, I don't get the finger for the pointer. My personal iTunes library works fine. It's just the store. I am using Windows 7. Everything was fine until the June update.