After I've been connected for a while things like buttons, the spinning lime icon, the green "connected" light and other things will dissapear from the application and not come back unless I quit and restart which is frustrating when I'm in the middle of a download. Anyone else experience this? And what can be done to fix it?

Your computer is running out of memory. Try quitting the application you most recently opened or an application that takes up a large amount of memory until the problem goes away.

Thanks for the info. I'll try designating more memory to limewire and see if that helps.