After the 3.0x forums were archived I noticed a minor typo. The description of the forum shows as below

phpBB 3.0.x Forums Archive
This is an archive of the phpBB 3.1.x Support, Discussion, MOD and Styles Forums. It is provided purely for reference purposes.

Believe it should say it's an archive for the phpBB 3.0x support etc... vs 3.1x