The Debian community will know that [tag:squeeze] is version 6 and [tag:sarge] is 3.1. Similarly the Ubuntu community will know that [tag:natty-narwhal] (natty) is 11.04 and [tag:hardy-heron] (hardy) is 8.04.

If I asked a question about Windows 6.1.7601 or 6.0.6002 would you know which is on topic ?

The important thing is that their respective communities know what they mean. It's not broken so don't try and fix it.