While investigating https://bugzilla.mozilla.org/show_bug.cgi?id=1138463, I compiled mod_perl 2.0.9-dev, but it still has the same problem as 2.0.8 and older: mod_perl doesn't understand the new directives from Apache 2.4 used in .htaccess.
Apache 2.4 now uses directives such as "Require all denied" instead of the old "Deny from all". But when mod_perl is installed, this makes Apache 2.4 to crash with: [core:alert] .htaccess: Require not allowed here Maybe mod_perl is confused because "Require ..." directives are also used for authentication. Anyway, for now I use this hack: <IfVersion < 2.4> Deny from all </IfVersion> <IfVersion >= 2.4> <IfModule mod_perl.c> Deny from all </IfModule> <IfModule !mod_perl.c> Require all denied </IfModule> </IfVersion> But this is not ideal. Known bug?