Not sure why people keep saying that Bell Fibe TV doesn't support HDMI... when I first had it installed last year, the tech said to use HDMI (if I had an HDMI cable).
I had Bell Entertainment Service installed almost two years ago and had the opposite experience. The two techs that came over didn't outright say I couldn't
use HDMI, but strongly recommended that I go with component and analog or optical audio, as they've "had problems" with HDMI connections.
From what I've been able to tell and some of the techs I've spoken to recently, I think the issue was with the older silver STBs (VIP1216/1200), as I've had nothing but HDMI audio problems on both of mine since the very beginning. When I called support in the early days, they told me to not use an HDMI connection if I was having audio problems -- that the "recommended" connection is component video with analog or optical audio. I finally got a third-level tech support guy to come right out and tell me that they could
swap the box out if I really wanted them to, but chances were pretty good that I would have the exact same problems with the replacement unit. As a result I just gave up and went to using an optical connection for my audio in the living room and a standard analog RCA cable for the bedroom TV (which fortunately had a separate analog audio input on HDMI 1 in order to support DVI connections).
However, the newer black 1200 that I had installed in my daughter's room last fall has worked flawlessly under the exact same conditions (I moved it around to my other TVs for testing). When the tech installed the black VIP1200 he mentioned that it was a newer and "more stable" model.
I finally called Bell and had them replace both of the silver units (the 1216 also had a nasty habit of rebooting and wiping out all of my saved recordings every few weeks), and they automatically swapped them out for a black VIP1232 and black VIP1200. Both of the new units work flawlessly even with full 5.1 Dolby Digital audio over HDMI.
Bottom line is that I'd recommend that anybody who is having problems with the older silver STBs call Bell and get a replacement. More than one technician has told me that Bell isn't even stocking the older models anymore, so you should end up with a newer 1232 PVR or black 1200 non-PVR STB.