I had someone with a config error, and I asked them what version they were running, but since there was a config error, OpenVPN didn't show the version banner before the config failed to load.
Turns out they had version 1.6, but I'm able to reproduce this in 2.0. It would have made it easier to figure out what version they were running and get them into 2.0 land. The config error was the "pull" option which 1.6 didn't have. I added the config option "eeegads" and I got the same non-banner error in 2.0. Thanks, -- -bk