On initial examination, I see no meaningful issues in that output.
Just to check: is the output of that 'apt-cache policy' command any
different if you replace 'libwine' with 'libwine:i386'?
If so, please pass along the output from the latter version of the
command. (My bad; I forgot to specify it in the original case.
Here's that output:
# apt-cache policy libwine:i386
libwine:i386:
Installed: (none)
Candidate: 4.0-2
Version table:
4.0-2 500
If not, I'll have to think about the next step. I know what I'd do if I
had the problem, or had shell access to the box with the problem, but
trying to turn it into steps someone else can follow remotely (without
realtime supervision) is a bit trickier.
Yeah, I understand that, aways easier to do something yourself. Unfortunately, I can't give you shell access.