Upgrade a Single Package

[Fred White <subscribe@cakafete.com>]

Is it save to upgrade a package from sid?

I would like to upgrade my opendkim from 2.6.8 to 2.8.2

Also, if I do "aptitude update" and then "aptitude -t sid install 
opendkim" should any other areas get up dated to accommodate the 
opendkim upgrade.

I ask because I tried that and I see lost of other files seems to be 
modifying



Thanks

Fred