I'm a new Mac user (just started using one last December). Ever since I got my Macbook, I only update it using the software update and got no problems until 10.5.3. Before the update, I was watching the Mac tutorial videos on Apple's website. After I updated though, I noticed that I can't watch any videos from apple.com, and the places where the videos were supposed to play in have been replaced with the faint "Q" logo and the white question mark. I have been searching the internet for answers but almost none of them apply to my case since those that were posted were about problems playing YouTube videos or flash movies, which I don't have any problem as of now. I haven't tried any thing just yet because I'm afraid I might do something that will make the problem worse. My friends who also have Macbooks don't have problems with Quicktime. Just a while ago, I updated Quicktime to 7.5 using software update, hoping that it can fix it. Unfortunately, the problem persists and now I can't even watch the WWDC video which is not embedded in the page. The link to watching the video disappears when I try to click it. Please post step-by-step instructions on how to fix it. I might go to Power Mac Center during the weekend (I hope that it will still be covered by my warranty). By the way, I'm only using Safari 3.1.1. and I don't have Firefox, so I can't check it in another browser.