Sorry to start a new Voice Chat thread, but my issue seems different from the others.
I'm on a macbook pro, 2.53ghz, 4gb ram, etc (bought it in October 08).

Normally, when I join a group, I can't hear anyone and no-one can hear me. I go into the voice chat control panel in VO, and toggle VC off then on again, and all of a sudden I can hear everyone! After 14 minutes, I start not hearing anything again (I'm not sure what event caused this, I need to do some further debugging). Again, I go into the VC panel and toggle VC off and on again, and everything works.

Just frustrating that VC eventually dies on me.

I just checked my logs:

[Thu Apr 2 22:00:07 2009] Connecting Voice Chat.
[Thu Apr 2 22:00:07 2009] Voice Chat Connected.
Voice Chat Connected.
Voice Chat Connection Established.

lots of things happen...

[Thu Apr 2 22:13:47 2009] You are entering Sedina D-14
k'metreq has entered the sector, but is out of range.
marcuse has entered the sector, but is out of range.
[ONE]Star Buck: Corvus Vulturius- 43% hull, 0m away.
I:Unknown S:Unknown U:Unknown
[Thu Apr 2 22:13:50 2009] (group) [Edras G-11] <Strat> clear
[ONE]Star Buck has changed their standings. New standings as follows:
I:Kill on Sight S:Pillar of Society U:Pillar of Society
[THC]marcuse: IDF Valkyrie Vigilant- 68% hull, 4997m away.
I:Pillar of Society S:Pillar of Society U:Pillar of Society
[THC]marcuse has changed their standings. New standings as follows:
I:Pillar of Society S:Pillar of Society U:Pillar of Society L:Pillar of Society
[ONE]Star Buck has changed their standings. New standings as follows:
I:Kill on Sight S:Pillar of Society U:Pillar of Society L:Pillar of Society
[Thu Apr 2 22:14:13 2009] Voice Chat Disconnected.
Voice Chat Disconnected.

Nothing happened between my jump into D14 and VC disconnecting except a bunch of printout from a few of my plugins. Not sure what happened here.

EDIT: some further information from starting up VO:

build 9G55
MacOS version 1056
This is an x86 Macintosh with a Pentium processor.
Hardware: (7 4:i386 CPU_SUBTYPE_INTEL(4, 0)) MacBookPro5,1 @ 2530 MHz (x2), 4096 MB
archive returned 0
[Thu Apr 2 20:38:20 2009] Can't load driver /Applications/Games/Vendetta.app/drivers/gkvc.dylib: not a Mach-O MH_BUNDLE file type
[Thu Apr 2 20:38:20 2009] Can't load driver /Applications/Games/Vendetta.app/drivers/libfmodex.dylib: not a Mach-O MH_BUNDLE file type
[Thu Apr 2 20:38:20 2009] Found driver: "Mac sound driver". Type 1, Version 8.1. Load @0x0046ecf0
[Thu Apr 2 20:38:20 2009] Instantiate address: 0x3754c2
[Thu Apr 2 20:38:20 2009] Found driver: "OpenGL Reference GKGL driver". Type 5, Version 72.0. Load @0x0046f230
[Thu Apr 2 20:38:20 2009] Instantiate address: 0x385a96
sound driver initialized.
[Thu Apr 2 20:38:21 2009] load_sample_ogg: Couldn't open sound/mission.updated.ogg (mission.updated)
[Thu Apr 2 20:38:21 2009] load_sample: Couldn't open sound/mission.updated.ogg (mission.updated)
[Thu Apr 2 20:38:21 2009] load_sample_ogg: Couldn't open sound/nfz.warning.enter.ogg (nfz.warning.enter)
[Thu Apr 2 20:38:21 2009] load_sample: Couldn't open sound/nfz.warning.enter.ogg (nfz.warning.enter)
[Thu Apr 2 20:38:21 2009] load_sample_ogg: Couldn't open sound/nfz.warning.leave.ogg (nfz.warning.leave)
[Thu Apr 2 20:38:21 2009] load_sample: Couldn't open sound/nfz.warning.leave.ogg (nfz.warning.leave)