Q: Has anyone had issues with this update on MBA (late 2010) running 10.8.2?

Not sure we are talking about the same thing.  I have been supporting this particular MBA since it was purchased in 2010 and ARD has been flawless until the ARD client upgrade to 3.6.1.  As I mentioned, I have others macs (ie NOT MBAs) that are running OSX 10.8.2 and ARD client 3.6.1 that are working as expected (ie screen saver lock with password required).  I also did not make it clear that the login problem extends to the end user when there is NO ARD involved.  I wound up having to temporarily turn off screen lock password required since everytime the screen lock engaged, the user was LOCKED out of the computer completely.  I may have to nuke the machine and restore from TM and see if that will correct the problem.

The end user can initially log into the acct without issue.  It is ONLY when the screen saver lock kicks in that the password NO longer works.  The same thing happens when I come in over ARD.  If the machine has just been booted and no one is logged in, then the initial login works, however, if the machine is in screen saver lock, then I can't get in with the proper password either.  The only way around the deadlock is for me to use the switch user, which rather than asking me what user, just immediately switches ARD into the hidden view mode and drops me into the end user space.  From there, even though ARD shows that I am in hidden view mode, when I press the hide button, rather than unhiding the screen from the end user, I get the pop up asking for a screen message which is what I should get when INITIATING hidden view mode.  If I just play along and then hit the hidden view button a third time, then ARD unlocks the screen to the end user.