4.2.4 addresses a few regressions in the 4.2.x line and includes many fixes and enhancements, with no immediate issues remaining. 4.2.4 is a recommended upgrade for all 4.x users now. Please note that the 4.2.x line moves into maintenance mode at this point, with a low-volume 4.2.5 maintenance release scheduled for mid February.
4.1.9 is designed as the last release in the 4.1.x line, backporting applicable bug fixes as well as selected recent enhancements from 4.2.3 / 4.2.4. Note that this is the ultimate 4.1.x release: Your next upgrade step beyond 4.1.9 is the above-mentioned 4.2.5 in February, even for compatibility issues and security vulnerabilities.
In the meantime, development towards 4.3 has started already, soon to be found in our master branch. We are aiming for a 4.3 release candidate in mid April and a 4.3 GA release in June. So if you happen to be interested in the latest developments there, check out 4.3 RC1 issues on JIRA and 4.3 build snapshots as they become available…Cheers, Juergen.
“O Senhor está perto dos que têm o coração quebrantado e salva os de espírito abatido.” Salmos 34:18