Proposals for open issues with no response

I'm trying to put together this week's survey, and I have come across
several issues marked as proposals for which there are extensive WG
comments, but no actual proposal for a response. Unfortunately, I can't
tell who edited the issues! I'd love to get these on the survey. If you
edited an issue, please let me know so we can see whether we can get a
response drafter and put onto the survey. The particular issue numbers are

LC-2616<https://www.w3.org/2006/02/lc-comments-tracker/35422/NOTE-UNDERSTANDING-WCAG20-20120103/2616>:
Why is "navigation" confused with "input"
LC-2621<https://www.w3.org/2006/02/lc-comments-tracker/35422/NOTE-UNDERSTANDING-WCAG20-20120103/2621>:
The permissible uses of heading levels and F43
LC-2585<https://www.w3.org/2006/02/lc-comments-tracker/35422/NOTE-UNDERSTANDING-WCAG20-20120103/2585>:
Known failures should include setting main page container overflow to
hidden preventing scrollbars
LC-2620<https://www.w3.org/2006/02/lc-comments-tracker/35422/NOTE-WCAG20-TECHS-20120103/2620>:
Reference to the title attribute on a techniqu that deals with abbr

P.S. Thank you so much, unjknown WG member, for taking the time to review
these issues and writing up your thoughts about them...