Hi
I found this in the release notes:
4.10. Deprecated packages
With the next release of Debian GNU/Linux 6.0 (codenamed squeeze)
   a bigger number of server packages will be deprecated, thus
updating to newer versions of those now will save you from
trouble when updating to 6.0.
Should squeeze be referred to as 6.0 already?
Wouldn't that be decided later?
//Marcus