Nope....I am riding a dropper post that was almost as far down the tube as it would go and I had one other crack through a weld in a chain stay, one other in my shop that I know of through a chain stay as well, all through areas they should not....the welds. Regardless Jamis stands and warrantees all the failures great customer service.I don't know for sure if this is the case, but if you guys are riding the stock crank-brothers seat post it is kind of flexes a lot. If the post if pretty high like mine is and you weigh 190lbs + that could be an issue. I put a Thomson on mine which is also a little longer than the stock post that came on it. Like I said I have had no issues with the new frame and if there were tons of issues then we were here more complaints. They seem to be isolated, but also seem to happening to the same riders over and over again.