IMPORTANT - READ THIS ! More than 120 tickets were created and closed for 2.3
We had a crash disk on our server (we lost everything) and last backup was around 1 year old. We lost around 80 tickets related to v2.2.0 and more than 120 related to v2.3.0. We also lost about 200 SVN commits on the same period.
There is no functional loss. Changelog gives an idea of main changes.