JeLuF recently set up the Wikimedia servers to send their syslogs to zwinger, and we noticed that from each of the squids, messages like the following are regularly appearing in /var/log/messages:

Jun 15 11:00:53 coronelli squid[1192]: varyEvaluateMatch: Oops. Not a Vary match on second attempt, 'http://en.wikipedia.org/wiki/Loop_quantum_grav ity' 'accept-encoding="gzip,%20deflate", cookie="enwikiSession%3dd01e31dd136539b2bdd41027d84368c8"' Jun 15 11:00:55 coronelli squid[1192]: clientProcessHit: Vary object loop!

I've switched the messages off for now by adding "debug_options 33,0" to squid.conf on each squid, because they were repetitive and drowning out anything else in the log. Gabriel, do you have any idea what's wrong here?