This has been happeneing to me for months. I relogged about 3-4 tims until my voice connects. They changed something and I do not know what it was. One month working fine, the next problems. That SL link is not good for users that been voicing for 6 years. There is something wrong with the vivox, said maybe my firewall, turned it off. to no avail. This really needs to be addressed, people are asking for skype as they can talk trhough it instead of voice in SL. What's the point if voice is all of a sudden crap.
It really needs addressing.