I see traffic from this last IP address octet all the time from prefixes of length less than /24.  Use of these host id's when the prefix length is greater than or equal to /24 is illegal.  So if that's your case, I'd suggest not doing it.

If that's not the case, look for over-zealous or incorrect filters in the path.  I saw this situation once before.  There was a border ingress filter with a typo in it...

Chris

> Various people I've asked about this have said they wouldn't
> use the .0
> or .255 addresses themselves, though couldn't present any
> concrete info
> about why not; my experience above would seem to suggest a
> reason not to
> use them.