I've logged on normally onto the latest build (6691) only to notice that the viewer fails to connect SLvoice. Despite it being active, it makes ZERO attempts to connect. This problem also seems to happen via the build just under the latest build (6679).
The only way i can seem to connect to it as a work around, is by going into the viewers files, and manually toggling it on. However, this only works as a one time thing, and once i log out, i can't activate it manually again.