Re: maxdatarenderdepth="1" not working on flexmenu?
My apologies, I think I misidentified the issue.
It looks like the skin from which I was adapting also had the pagemenu listing subpages, which I was confusing for the sitemenu's rendering.
I removed that and it appears that everything is working as expected. The render depth does have to be set to 0, however, not 1. I got 1 from another post in the forums here but it appears that was incorrect.