My OS is 64-bit Ubuntu; I compiled FS2 Open from SVN and use the data files from the GOG version. I have the mediavps_3612 folder from the master 7z file; the command line I used to start FS2 was "fs2_open_r -spec -glow -env -missile_lighting -normal -3dshockwave -orbradar -3dwarp -warp_flash -snd_preload -ambient_factor 35 -ogl_spec 20 -spec_exp 15 -spec_point 1.2 -spec_static 1.5 -spec_tube 1.5 -mod mediavps_3612". It displayed the MediaVP startup screen, then announced that the currently active mod had produced 499 errors; I dismissed the dialogue, but when I attempted to go to the current mission briefing it crashed, with the error message
ERROR: "Could not load exp04 anim file" at fireball/fireballs.cpp:315
AL lib: ALc.c:1879: exit(): closing 1 Device
AL lib: ALc.c:1808: alcCloseDevice(): destroying 1 Context(s)
AL lib: ALc.c:1420: alcDestroyContext(): deleting 5 Source(s)
Inconsistency detected by ld.so: dl-close.c: 731: _dl_close: Assertion `map->l_init_called' failed!
Any suggestions?