K-x Body Vibration Issue - Case Studies

In my last K-x review, I reported that the K-x is a Shake Addition (!) DSLR as found practically in the field with more blurred pictures were resulted when shot handheld at lower light. Today, I've come across two posts and test demonstrations with comparison pictures posted at the DPR Pentax forum that other K-x users do find similar problem (but of different phenomenons and possible causes,