The directive AddDefaultCharset is broken. i.e. adding: AddDefaultCharset UTF-8 doesn't work out.
This is not an upstream bug, I double checked with upstream already.
Addition Info & Steps to reproduce: 1. set the direcitve: AddDefaultCharset UTF-8 2. use indexing to list a directory The directory is served as ISO instead of UTF. Double checked with upstream: in original apache the issue is not present.
The bug appears only while using directory index. I assume, it is related to the mod_dir patch.
solved: use: IndexOptions Charset=UTF-8