OK, I admit that I'm a recovering Clyde, but I've recovered to the point that I weigh around 160 on a 6'2" frame. So I'm not putting a lot of stress on the bike frame.
Story goes like this. I bought a new GT with the aluminum GTR frame on April 18th of this year. I have about 5000 miles on it. I pretty much tore up the rear wheel, and bought a new rim. Not a super expensive one because I intend on upgrading my ride to a CF frame model when the money gets in. So, instead of swapping out the cassette myself, hey, at 5K it's time for a winter overhaul anyway. Dropped it off at my wife's favorite LBS, since the guy who sold it to me is closed for the winter. I could call him and he'd get to it eventually, but he will take his time doing it. So, I drop it off Tuesday on the way home from work.
Yesterday, got the call. They found a crack. One that I should have noticed, but somehow missed. Starts in the seat tube about 2" below the seat post clamp, and extends about 4" into the top tube. Frame is now junk. Stopped on the way home, and yup. There it is. Staring me in the face and asking me, hey, moron, how'd you miss this? I know that they guy who set it up tightened the clamp with a torque wrench, and I've never moved the seat post since, so I doubt that was the cause. And the seat post itself is pristine.
Before anyone asks, I've never crashed the bike. There isn't a dent, chipped paint, or even a scratch along the sides of the crack. Starts behind and travels across the seat tube/top tube weld. The weld is smooth and neat, typical of GT welds.
Guys there are really nice. Offered to call GT and ask how and where to take it for a warranty claim, even though they're a Trek/Raleigh dealer.. In addition to the guy I bought it from, whose availability until March is open to question, there's another small LBS that at least is open weekends. So far, no answer from GT. Which, I have heard, is SOP for their CS department.
Have I said good things about GT frames here? I believe I have. I take them all back.