Listing known bugs that will be in 2.4.0 if it happens to make release as GA. If you know of any bugs or odd behavior (2.3.x) please post them.
Bugs:
1. If you need to use
AcceptFilter https none
due to AcceptEx errors (which eventually will make the server unresponsive, in Apache 2.2 the directive was Win32DisableAcceptEx) , SSL pages may not always show up (blank white page returned) or you may get partial response (missing images for the most part has been my experience).
https://issues.apache.org/bugzilla/show_bug.cgi?id=52476
EDIT: This looks to be on it's way to being fixed. What is causing this bug seems to be found.
2. mod_proxy_balancer seems to be borked. I posted about this long ago, Mario has created a bug report for it with a good test config.
https://issues.apache.org/bugzilla/show_bug.cgi?id=52402
Edit: This affects XP as well, just tested it. Unlike you Mario, commenting out the BalanceMember lines and it still would not start.
Odd Behavior:
1. If mod_auth_digest is loaded and on Windows Vista/2008/7 do not try to start from console, it will not start.
2. If mod_heartmonitor is loaded and using mod_slotmem_shm and on Windows Vista/2008/7 do not try to start from console, it will not start.
With the exception of Bug #1 above, all seem to be related to SharedMem on the higher versions of Windows.
The AcceptFilter https none bug has been fixed and will be in the coming 2.4.3
http://marc.info/?l=apache-cvs&m=134497899201739&w=2