O gajo em questão tem uma 5D das primeiras, apenas utilizou a 5DII como utiliza normalmente a antiga, mencionou neve ligeira, e não sei se se lembram, na comunicação da Canon a 5DII viria com a selagem melhorada em relação à 5D original.
http://forums.dpreview.com/forums/read.asp?forum=1032&message=31011771
"In the case of the 5D2, Canon provided a spec, apparently no longer
> published, which indicates water resistance exceeding the demands of
> the OP. In addition they continue to make claims that the 5D2 is
> superior to the original in this regard. As a 5D owner, I have used
> my 5D regularly in the problem conditions that appear to have led to
> failures in the 5D2. Now I'm just one guy, but I'm hardly the only
> making this observation. Where are the 5D users saying that they
> experienced similar problems with their DSLR? I'm not seeing it. "