Thank you! That work-around let me get the important pages back up with minimal effort. I really appreciate it!
Thanks for letting me know. At least it’s not just me. I’m hoping the WordPress folk will take a look at this? The alternative right now is to rebuild the broken pages to use taxonomies, or to create a custom page-template for each broken page, and make the query there. The latter works — I’ve already done it for one page — but it results in redundant code.