(2007) "gethostbyname() etc break for /etc/hosts with both ::1 and 127.0.0.1 localhost entries" Initially closed by Drepper as "WONTFIX" or "NOTABUG" (can't find state history and it's been a while!) with dismissive comments, continuing to do so after people patiently explained how this was a real issue. It was eventually resolved (I don't know by whom)
Ulrich made tons of bad technical decisions, and mistreated everyone who disagreed with him, was the reason Debian forked glibc for a long time, etc. There are some famous bugzillas that are utterly unexplainable.
You mean Roland? What did he do?