>> I have also repaired the desktop lock in GIT hash
>> 50739c9--you should no longer have the desktop and icon problems you
>> were
>> experiencing earlier. If they do persist please let me know!
>
> After rebuilding this took a long while to test because I could not
> discover any repeatable patterns. Because of that, the testing was
> confusing.
>
> Here is what happens on my desktop with the latest patches.
>
> ============================================
> When in graphical login mode and TSAK enabled:
>
> * Pressing Ctrl-Alt-Delete causes a Secure Desktop Area dialog to appear.
> Because of the nature of the process I could not grab a screen image. Here
> is an image with my digital camera:
>
> http://humanreadable.nfshost.com/trinity/build_logs/tde-lock-4.png
>
> * The Switch User and Logoff Menu buttons are ghosted/disabled. I don't
> know how to enable or why they are disabled.
>
<snip>

They are not yet implemented.

>
> Overall, I am unable to discern patterns to repeat the events I am
> sharing. Hence the ugly report. Let me know what further testing you want
> or need. Testing this locking mechanism is one of the more time consuming
> tests because of the weird events, which require restarting the session
> because only one lock is allowed and then the feature stops working.

This is VERY odd.  Can you look in your .xsession_errors log after the
desktop lock stops working and see if there are any odd messages in there?

Tim