I know the 4C is somewhat quirky anyway, but I've noticed lately over the last week or so that it tends to have good days and bad days. Even when I don't change it, Sport one day can feel totally different from Sport the next. A bad day, it's crashy and harsh, a good day it's tight but not harsh. I drive the same roads every day, and they are pretty bumpy, so I've grown used to how the R handles them. It's usually good for only a day or two, then back to bad.<p>Perfect example, there are two speed bumps outside my office. On a good day, the R feels like a normal car should over speed bumps. Tight but still dampened and smooth. On a bad day, it feels like I just drove into a 4 inch tall sharp edge and off the other side.<p>I remember Needsdecaf having issues with his 4C being fine sometimes and others excessively harsh and traced it to a faulty connection somewhere. I searched but can't seem to find the thread. Anyone else have this issue?