Earlier quoted context omitted.
I've only ever really noticed with 'time' and 'echo'
I have noticed this with echo too. In specific, the bash echo built in does not drop support for -n and -e when bash is forced into standards compliance mode as /bin/sh. That causes breakage on systems that use more strictly compliant shells when code was written against bash as sh under the assumption that either -n or -e work. I spotted a regression in Linus' tree a while back where this very thing happened in the…
LKML gets hundreds of messages every day. When I used to read it I had a set of search filters to prioritize it. Anything I didn't get to I simply marked Read. There's no way to catch everything on there.
Maybe get it passed through by someone who is in Linus's email filters.
Although it's been a year and you probably don't care anymore. :)