I've just noticed an update described thusly:
ESV Bible Version 2011 (9.0.0007b) 01/27/2012 5.42 MB
This patch updates the ESV bible to the 2011 release.
9 files: esv.dbx, ESV-Outline.dbo, esv xrd, esv.vmc, ESV.vmf, ESV.dbu, ...

On 1 November 2011 I applied an update that claimed to be the ESV 2011 release.
I haven't yet had the time to compare the databases of the "old" and "new" ESV 2011 releases, so I'm wondering if anyone knows why the re-release.