Hi, On Wednesday, November 25th I became the proud owner of a beautiful i5 iMac. This replaces a 1.42 Ghz G4 Mac mini, and the difference is simply indescribable. Like upgrading from a Neon to a Veyron. When I first got it, I noticed the infamous Seagate "grumbling" sound, but it subsided once I moved my iMac into my office and onto a different desk. Then I noticed the yellowish gradient on the screen. The upper 1/3 of the screen is a very clear white but as you move downwards whites take on a yellowish tinge. After researching this, it seems the old 24" iMac also had this problem. I figured I'd live with it. Now this is the issue that tears it for me. Last night (day 6 of ownership) my screen "blipped" for a split second. See 0:14 in this horrifying video: http://www.youtube.com/watch?v=SjOxlxVz5Os About 20 minutes later it blipped again. I haven't seen it since. Very minor, but it did happen. What if this flickering problem gets worse? What if the yellowing gets worse? Is it worth returning? Is this an issue Apple can resolve with a simple software update? I bought the iMac at the La Cantera Apple Store in San Antonio, but my mom had to use her credit card since my debit card has a daily draw limit (she transferred the money from my savings to her account later). I've since moved back to my college apartment in College Station and if I returned the iMac I'd take it to the Apple Store at the Houston Galleria. Will they willingly refund my money or will they play dumb? (ie "I haven't heard of any defects" or "you just got a rare faulty unit out of thousands") Crawling the threads on this forum and the Apple Support forums, there don't seem to be any fixes or remedies to these problems yet, so an exchange would be pointless and it could have more issues than my current unit. How would they refund me since my mom's credit card was charged for the purchase? Store credit? Should I get a refund? The flicker is impossible to replicate and very rare on my particular machine, would showing the above YouTube video be enough proof for them? I'd like to get a full refund and wait a few months until Apple has fixed the defects and they're confirmed to be fixed.