I've seen a few posts on this for "rooted" Droids, but not for a "stock" Droid.
My wife's Droid recently downloaded the 2.2 update a few days back and after installing, it then broke connectivity to her MS Exchange Server 2007 at work(something to do with requiring client cert's(tried EVERYTHING !)).
BTW...the problem is on the exchange-server side, so merely enabling the "Accept all SSL cert's" doens't help...that's only for 'self-signed' cert's
After about 4+ hours of tinkering, I found a stock firmware 2.0 image and successfully uploaded it and then proceeded to to install the 2.1 update.zip file.
So far, so good, and email is working again("Happy wife...Happy life"). Now she is constantly getting the update notification for 2.2 and has to hit 'later' about every 10-15min.
Until I can convince the IT-staff at her office to turn off the client cert's requirement(not even used, but somehow enabled?!?!?), we're desperately looking to just disable the constant annoyance of the 2.2 update since it has re-downloaded and looking to install the update again.
I can replicate the issue using the Motoral Android emulator...fails every time when tyring to connect to her mail-server, but works just fine when connecting to my work & home mail-servers.
I'm really not looking to solve the problem of the email-connectivity right now, just wanting to stop the annoying update-reminders.
Any thoughts or ideas out there ?