Still having the issue. Someone on another forum suggested I post some netstats on the client, so here they are:
Here's the routing tables with the VPN off:
Here they are with the VPN on:
Notes: The 85.17.*.* is my server's external IP, and is static.
10.15.30.* is the internal network I've set up on the box in /etc/network/interfaces for my VPN.
10.15.30.101 was the address I was assigned when I connected to the VPN.
192.168.2.* is my home LAN IP subset, 192.168.2.10 is my computer on the LAN.
Thoughts?