I just go a new MT3GS and I'm really impressed so far... except that when trying out Google Skymap, it seems really jumpy/jerky. It looks like the compass/magnetometer is giving a noisy or unstable reading (though it generally points in the right direction, at least after doing the figure-8 calibration). The snaptic compass looks fine, but I think that has built-in noise reduction. Anyway I don't have another phone to compare it with, but it definitely looks jumpier than videos I've seen. Has anyone else been able to compare compass tracking apps like this on the MT3GS vs other android phones? Is jumpiness normal? Does it indicate a possible defect in my phone? Thanks!