Version 2 of +CUETools
DB protocol will be released soon. Support for CTDB in ExactAudioCopy drastically improved the database growth. In CTDB version 1, so called confidence values, which tell you how many people got the same result when ripping the same CD, consisted of AccurateRip confidence values at the moment of the first submission plus the number of CTDB submissions since then. In version 2 confidence values will only report the number of CTDB submissions, so CTDB will become completely independent of AccurateRip.
Another important change is that the database will accept larger correction files for popular CDs, so that it will be able to repair twice as many errors.
The third change is that CTDB will no longer include pregap. Pregap is usually a few seconds of silence before the first track. Most CDs don't have a pregap, but some very rare CDs have actual music content hidden before track one. The database will no longer be able to correct those hidden tracks, but on the upside it will be able to work with rips where pregap was lost (it usually is, when ripping in file-per-track mode).