Discovered a little voice-mail glitch today. I was on a call and received a text (email to my SMS address) advising I had a voice-mail. So after getting off the phone I called my voice-mail to retrieve the message. However, whilst on the phone to voice-mail I received another text, i.e. another voice-mail. I proceeded with listening to 1st voice-mail & returning call (from within voice-mail). At end of returning call, I was back at voice-mail expecting to listen to the 2nd voice-mail message. There was no second voice-mail message. Backed in and out of voice-mail menus, still no other messages. Hung up the phone, message waiting indicator pops up, call up voice-mail, 1 new voice-mail - the 2nd voice-mail message.
It would appear voice-mail does not refresh itself with any new messages whilst you are listening to messages etc. This may just be how it is and not necessary a glitch, but a fix for this would be helpful.
E.G. ya get home, oh I have voice-mail I better check it, listening to 3 new messages, (meanwhile your friend calls & leaves an other message), hangup after listening to your 3 messages, not realising there is now another message waiting. Next morning you get up, notice phone has message waiting indicator, bummer it was my mate's message from last night saying come round for a few coffees :(