It seems to me that Internet Explorer 7 (as opposed to IE6)
displays the non-breaking-hyphen U+2011 or ‑
as some sort of en-dash rather than a hyphen.

See U+2011 #8209 at
http://www.alanflavell.org.uk/unicode/unidata20.html#x2010
http://niwo.mnsys.org/saved/~flavell/unicode/unidata20.html
http://www.cs.tut.fi/~jkorpela/dashes.html#unidash

Anyone else?

Now for the complete mystery:

In IE7, select
Tools > Internet Options > General > Accessibility >
[X] Ignore font styles specified on webpages

Then select
View > Encoding > Right-to-Left Document
on the above pages and the hyphen for U+2011 appears!