[Zope] Session variables

[Dennis Allison]

Zope: 2.6.2b3, Python: 2.1.3

I make extensive use of session variables in our site.  As our load has
increased I find occasional site errors where an active session fails to 
find a session variable and reports a KeyError.  This, as you'd expect,
causes problems (-:

The behavior I'm seeing is similar to that reported in issue 848 (pending) 
in the collector.  Is there a workaround? solution?

	-d