Paul Johnson:
> In R version 2.7.0 (2008-04-22) as.numeric(".") returns zero.
> 
>> as.numeric(".")
> [1] 0
Seems to be fixed already. In R version 2.7.0 Patched (2008-06-12 r45898):
$ as.numeric(".")
[1] NA
Warning message:
NAs introduced by coercion
-- 
Karl Ove Hufthammer