I'm not sure if I will be writing about the same thing you are all referring to (perhaps not), but I sometimes get a soft ticking sound right at the B pillar, and I'm pretty sure I know what the source is, as my first MkVI didn't do it, but my current one does.
Quite simply, I think the window tinting I have causes the ticking when the sun is shining directly on that side of the car (happens to both sides, only when sun is baking it). My guess is it is expansion of the glass as the sun warms it (on the assumption that the tinting is absorbing some of the heat), because if I press hard against the glass right near the B pillar as this is happening, I get the exact same sound, although at a higher rate depending on how hard I press. My first Golf didn't have tinting, and I'd never heard it with that one.
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