We have an Evenflo Triumph 65 LX that we bought before our daughter was born and she is now 2 1/2. The seat tightens with knobs rather than with a pull strap like most seats. To release the tension you press down on tabs next to the knobs. So, our problem is that one of the tabs just broke off! The seat is still usable with only one tab, but I'm wondering how long that one will hold out since it's presumably about as sturdy as its mate. Is this normal? Has this happened to anyone else? What's the warranty like on these Evenflo seats? Is this something they might replace? I don't see the point of buying a seat that is supposed to last 6 years if an essential part breaks after 2 1/2 years. But I would like to buy another similar seat because we like this method of tensioning a lot better than the prevailing pull strap. Thoughts?