I plugged in a set of tower speakers to my macbook pro and the sound worked fine, however when I unplugged them and tried to hear the sound through the notebook's built in speakers I couldn't and a symbol of a circle with a line through it showed up beneath the regular volume control indicator on ...

here the line is in the screenshot

I have had the new leopard operating system for a couple weeks now, and i've just began noticing little lines that run horizontally across my open windows, such as Safari, AIM, and iTunes. There is usually only one and it shows up every once in a while, and disappears sometimes when I scroll down ...