Ask Flickr: how do I change this light bulb?

I've got these overhead lights in my house that are fairly new. I need to paint this room, including the ceiling and also replace the bulb.

 

But there's no hardware of any kind. No screws, tabs, nothing. I can't twist the glass lamp part nor can I get the metal surround to budge. I can't seem to push up with the glass. Basically, I can't see any way into this light and I can't get any part to even jiggle in any direction.

 

So I ask thee of Flickrstan, how on earth am I supposed to disassemble this?

Done