With the help of Steffen (he built the Windows binaries for me) I can report:
r1861247 - works r1864126 - works r1872230 - works r1873368 - works r1874286 - works r1874347 - works r1874909 (=2.4.43) - fails! -- Sent from: http://apache-http-server.18135.x6.nabble.com/Apache-HTTP-Server-Dev-f4771363.html