I can attest that service bays cause this problem for me as well. A test build I'd put on the launchpad had 4 container brackets (from kerbal inventory system) attached to the inside with containers on the brackets. Attaching no less than a dozen struts between the service bay and external components doesn't do anything to fix the problem. More often than not, it explodes on the launchpad the moment the physics loads. If it decides to not explode on the pad, then it launches and flies around just fine. https://dl.dropboxusercontent.com/u/7133201/Station%201.craft Requires Karbonite and Kerbal Inventory System Edit - Opening the service bay doors when it's vibrating, but hadn't yet exploded the craft, seems to have an effect? Maybe it's a collision box error?