The release notes represent the state of the code at the time of release. Once the release notes are posted they are basically set it stone meaning that we won't go back and update them later for things such as defects, qualified software and such.
This is where you want to check for what we do and don't support:
http://www.cisco.com/en/US/products/sw/voicesw/ps2237/prod_pre_installation_guide09186a00801245c3.html
Hope this helps...
Keith