'http://blogs.technet.com/wsus/archive/2007/10/25/wds-revision-update-expanded-applicability-rules-auto-approve-revisions.aspx

MS:  "This was a revision to a previous update, not an update, which will install automatically if the original update is installed because of how WSUS is configured by default.  If you would like to disable this (actually useful feature) please follow these instructions..."

IT:  "But we didn't have the original update installed, and the revision to the previous, eh, not installed update, still automatically installed.  If we had the original update installed we'd be fine with the revision to the update installing."

MS:  "Yes.  Exactly.  ... <silence> ...There are $10 off coupons for the new Microsoft Zune and 30 day trial copies of Windows Vista on the desk in the back, thanks for coming!"

Somewhere in Redmond, an intern has been reprimanded for checking the "bypass all configured settings and restrictions and install update with no notice to computer owner" check box in the Windows Update packaging software.  The intern is now busy going through a stepped testing script for the new and improved Windows Longhorn Solitaire game, which will feature animated, transparent cards - FINALLY! - and require 1GB of RAM to run.

Tonight, as Microsoft "appreciates the problems" they have caused, the C-level staff and managers will meet at a Starbucks to discuss how hard their day was; the intern will go around to all the desktops in Redmond and uninstall Desktop Search by hand -  as even Microsoft doesn't use it, and all their PCs automatically updated along with ours.

I also think its stinks that WDS is required to use indexed searching in Outlook 2007!
They aqquired Lookout software in 2004 and now blocked the use of that program and others

Everytime you open Outlook open it keeps asking for WDS
Something needs to be done on this subject too

Best Regards,
Rick

Little update:
It turns out that these updates override your WSUS server settings, and set themselves to install automatically for all computers, regardless of any other approval rules you defined.

I blogged about it here, with screenhots from WSUS:
http://geekswithblogs.net/jemimus/archive/2007/10/25/116319.aspx

Of the 2000 clients I administer, everyone with local admin rights recieved the popup saying this update was needed, this included all laptop users, and various factory production line machines we have. We are not happy about this either.

I just happened to notice my clients needing this "update" shortly after it was listed in my WSUS server.  I've been searching for posts such as yours since then because I was not happy to see this.  I have since removed the Updates category from automatic approval.  Microsoft should know better than to put us in the middle of its battle with Google.