Error 80188309 glitch for Nokia Lumia Black worldwide update

It looks like Nokia is speeding ahead with the roll-out of the Black update for Lumia Windows Phone devices....perhaps a little too fast.

Users are reporting failed installation of the update with error code 80188309.

Complaints are rolling in at the official Microsoft Windows Phone forums.

The Lumia Black firmware update comes bundled with Microsoft's Update 3 for the Windows Phone 8 operating system. And one theory about the problem is that devices are downloading Black but Update 3 is still not available in some areas. 

Black needs Update 3 to work. And that could be causing failed installations of Black. 

But Black is installing fine if Lumia owners already have Update 3 through Microsoft's freely-available Preview for Devs app. 

The message is....keep hitting that update button.

Update: It also seems many users can't download Black-specific Nokia apps after the download - like Nokia Camera and Nokia Refocus. They get "not available for your device" messages in the Windows Phone Store. Another trying-to-get-it-out-in-a-rush glitch?

Update 2: This post on the Microsoft Windows Phone forum seems to back up the theory that some users are missing out on WP Update 3 when downloading Black:

Update 3: Here's how to get Update 3 (GDR3) before getting Black.