Some folks might consider switching to non-exit nodes to just get rid of
the overload message. Please bear with us while we are debugging the
problem and don't do that. :) We'll keep this list in the loop.
The undocumented configuration option 'OverloadStatistics' can be used to disable the reporting of an overloaded state. E.g. place the following in your torrc:
OverloadStatistics 0
May be worth considering until the reporting feature becomes a bit more mature and the issues around DNS resolution become a bit clearer.