Open Stack

Hello all. We've recently upgraded our cactus system to more recent
code. In the process of doing this, we've started logging whenever we
get tracebacks out of any of the openstack components we are running.
Some of these are clearly bugs, while others correspond to normal
operational conditions (like the case where all compute resources are
occupied). My question is, what is the project position on tracebacks?
Should they be considered to be expected, or should we be treating
them as bugs and filing tickets/patches for them?
thanks.
 -nld