Crashes on mine too.
If your crash log also contains the lines
Exception Type: EXC_BAD_INSTRUCTION (SIGILL)
Exception Codes: 0x0000000000000001, 0x0000000000000000
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Thread 0 Crashed: Dispatch queue: com.apple.main-thread
0 org.aegidian.oolite 0x00000001002eb588 vorbis_synthesis_headerin + 2104
1 org.aegidian.oolite 0x00000001002e8397 _fetch_headers + 1383
2 org.aegidian.oolite 0x00000001002d3c56 ov_open + 342
3 org.aegidian.oolite 0x0000000100005d88 -[OOCASoundVorbisCodec initWithPath:] + 163
4 org.aegidian.oolite 0x0000000100004823 -[OOSound initWithContentsOfFile:] + 81
5 org.aegidian.oolite 0x000000010002560e +[ResourceManager retrieveFileNamed:inFolder:cache:key:class:usePathCache:] + 194
6 org.aegidian.oolite 0x000000010002578e +[ResourceManager ooSoundNamed:inFolder:] + 126
7 org.aegidian.oolite 0x0000000100042e35 -[Universe preloadSounds] + 274
8 org.aegidian.oolite 0x000000010002681f -[Universe initWithGameView:] + 1297
9 org.aegidian.oolite 0x000000010000c288 -[GameController applicationDidFinishLaunching:] + 477
as the crash log of pescenaufrago shows, we are talking about the same crash. You both are using the same system. Although I also use 10.6.8 and never had problems. That makes it difficult as other parts of the OS system also interfere in the bug. It happens on initialising the sound. I've never looked at the sound code and currently have no clue were to look. And specially because its a bug that not happens on all similar systems.
I hope Ahruman finds time to look at it, because he probably is the only one with knowledge about the sound code on the mac.