Ah, I think I know what's going on.
ships.tbl(line 99:Warning: Unable to find [Terran] in species names list.
The game tries to use the ships.tbl in the /data/tables folder, but the 3.4 beta comes with its own ships.tbl which references the new species_defs.tbl.
To solve the problem, either delete the ships-tbl in /data/tables, or replace it with the one in the B5-A-Patch-3_4.vp. It's not your fault, I should have pointed that out in the Linux/MacOSX thread.
And before kara starts yelling at me what the ships.tbl was doing there in the first place, it was actually necessary to be there. The 3.3a.vp has a table built for 3.6.7, which isn't compatible with the newer turret animation syntax. So I included an updated table outside of the VP to override the old table.