[mythtv] Channel ordering wrong in 5.1 (at least for me)

[Ed W]

OK, quick show of hands - how many people have 5.1 output from Myth and 
if so is your channel ordering correct?  If so/not can you please state 
what audio driver you are using? If Myth works correctly for you, does 
mplayer get the channel ordering wrong on your setup?

Using Jack as my output driver I believe I am seeing channel ordering 
from Myth as:
     "lf", "rf", "center", "lfe", "lr", "rr"
     (lr = left rear, rf = right front, etc)

What I am expecting is (This is the ordering used by default out of 
mplayer/xine):
     "lf", "rf", "lr", "rr", "center", "lfe"

I can easily fix the problem for just the jack layer, but it seems 
reasonably likely that this wants adjusting in some smarter way for 
everyone I think?

The background to this is that BOTH of the above channel orderings are 
"valid", and also it's fairly easy to remap any given device using 
alsa/jack.

However, my reading on this suggests that the "Front x2, rear x2, c, 
lfe" ordering is the most common arrangement on linux, and in particular 
is the Alsa, mplayer, xine default?  Anyone care to comment either way?

Can I see some feedback on who this is working for and who it's broken 
for right now so that I can get an idea on best way to go with this?

Thanks

Ed W