My DAU for XPSP2 was stuck at version 0.

Not understanding what updates/increments this version, I thought it may be a client side issue and uninstalled and reinstalled the Agent. I can't recall what else I may have adjusted... I believe all I had done was reschedule the Subscription Communication to happen ASAP... but the end result was that the version number started updating, and I watched it climb to rev 3 as I performed Refreshes.

But then I noticed that even though the initial Refresh after the Agent re-install pulled down the 10.0.2 MSI's, the Agent was actually still 10.0.1. So after following the TID for manually updating the agent packages, I uninstalled and reinstalled the Agent, and confirmed version was 10.0.2.

So I started looking around the ZCC and found something interesting in the System Information log...

Content windows-x86_64-en-vistasp0-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86_64-en-2k3sp1-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86_64-en-2k3sp2-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86_64-en-xpsp1-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86_64-en-xpsp2-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86-en-vistasp0-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86-en-2k3sp0-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86-en-2k3sp1-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86-en-2k3sp2-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86-en-2ksp3-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86-en-2ksp4-1206943204200_sigs.zip successfully imported into the system.
Content windows-x86-en-xpsp1-1206943204200_sigs.zip successfully imported into the system.

...

Where is Content windows-x86-en-xpsp2-1206943204200_sigs.zip successfully imported into the system.?

I look through the logs and the only working DAU incrementings have been after Subscription updates where the XPSP2 sigs were created/imported... so why has this stopped working? How do I correct it?

Daniel