I appreciate the advice. I started using html and then xhtml a while, and while my background is essentially SGML (and it's truncated, narrowed offspring xml, html, etc, ). I got deep into CSS well ahead of MS, and Yahoo!, also, now that I recall.
It might sound sacrilegious, but I'm not concerned with high-level YUI stuff to build yet-another Facebook data collection gimmick. I just want a level playing field, across A-grade browsers.
I've appreciated the help and encouragement very much.