PageRank Drained: Google Updates

What might have happened?

[marketingagency]

I had a look on top sites in my list this evening and I saw all the PR drained from 5 to 0 for 4 of my sites.

What would have happened?

IS the GOOGLE UPDATES Through?

[Kufu]

The Google update is not complete yet. If your PR doesn't come back by mid-March then you may have done something naughty. :)

[CainIV]

Not an update yet. You are most likely seeing a rollback, or the case of a single DC showing pr0 results for your sites, which happens.

Be patient.

[gregorym]

This is not an update, it's a rollback.