I'd say “personal differences” (regardless of the deal about trademarks and code review), but it still surprises me; I thought the zmq developers were a tight-k

I'd say “personal differences” (regardless of the deal about trademarks and code review), but it still surprises me; I thought the zmq developers were a tight-knit bunch. Maybe the drama manifests itself in more extreme ways because they know each other so well, but it does seem dysfunctional.