I've just seen edits to the tag wikis for java1.5 and java1.6 and thought "Strange, there are already java-5 and java-6 tags with perfectly cromulent tag wikis; why is there duplicate work?"
And I saw that there are a few questions (24 and 53 respectively) tagged with those tags. I suggest them as tag synonyms but experience tells me that those don't get votes, so I'm asking for votes (for both tags) or mod interaction in getting those synonyms in the system.
Normally I'd just retag those questions, but I'm pretty sure that those tags would pop up again pretty quickly.
And yes: Java 1.5 is the same as Java 5 and Java 1.6 is the same as Java 6.
Update: There are still not votes on the synonyms, people seem to agree that they should be here, but no one seems to be able to vote.