Hello, I believe I'm having a problem with XML files on my 1.83ghz Macbook Pro. I often get a warning dialog box that says XML data cannot be retrieved, etc. Also, I often cannot hear the audio from streaming video files. I spotlighted for any XML files on my computer and another dialog box came up that said "Could not open file." To be honest I have no idea what an XML file is or what it really does, but hopefully someone can help me fix this problem. Thanks in advance.