[:space:] bugs in 2.6.3?

[Karl Berry]

1) Did not expect this to match, but it does (I see no space between an e
and an n?):

$ echo "overseen"  | grep 'e[:space:]n'
overseen


2) Expected this to match, but it doesn't:

$ echo "are not" | grep 'e[:space:]n'
$


3) Compiled from original source.
$ grep --version
GNU grep 2.6.3

Thanks,
karl

P.S. Is there another non-Perl-regexp way to match across line boundaries?
I suggest making this another example in the Usage node.