Title says it all, when displaying the number of comments, it's OK for 1 (comment), and for multiple (comments), but with 0 we do have an "s", I believe we shouldn't :)
Same thing on vf.org using the mobile theme.
Same thing on my current "master" 2.1 forum with bitter sweet theme.
"0 comments" is the correct pluralization.
"Treatments differ in expressions of zero quantity: English often uses the plural in such expressions as no injuries and zero points, although no (and zero in some contexts) may also take a singular. In French, the singular form is used after zéro."
I guess that's because I'm french that I found it odd :)
Sorry for the noise.