So, for my configuration only "Set nameserver" and "Set nameserver (3.0b10)" are in any way usable, and "Set nameserver (3.0b10)" allows me to split the DNS queries along the same lines that the traffic is split.
I have two questions:
Set nameserver: client.up.tunnelblick.sh and client.down.tunnelblick.shSet nameserver 3.1: client.1.up.tunnelblick.sh and client.1.down.tunnelblick.shSet nameserver 3.0b10: client.2.up.tunnelblick.sh and client.2.down.tunnelblick.shSet nameserver (alternate 1): client.3.up.tunnelblick.sh and client.3.down.tunnelblick.sh
A better test would be to browse to a website using Safari.
The settings and their corresponding scripts are:
Set nameserver: client.up.tunnelblick.sh and client.down.tunnelblick.shSet nameserver 3.1: client.1.up.tunnelblick.sh and client.1.down.tunnelblick.shSet nameserver 3.0b10: client.2.up.tunnelblick.sh and client.2.down.tunnelblick.shSet nameserver (alternate 1): client.3.up.tunnelblick.sh and client.3.down.tunnelblick.sh