Which plate is that? It looks nice and low profile, unlike the weird slider one everyone uses. I thought about using glue, but since I'll likely sell my Glidecam when I upgrade from a DSLR, I figured there would be a better way.
Here's the plate I'm using. Since the base isn't flush, I have no choice but to mount it right off the edge, and sideways (stupid). I cut a small square of exercise band, folded it over, and threaded the screw through that. It works better if the rubber is in between the Glidecam plate and the QR plate than underneath it. It works fairly well; the screw doesn't come loose anymore, though there is just a hair of rotation if rotational force is applied. However, there's enough friction so that it won't rotate unless you intentionally do it, or you bump it.