Ignoring accents/diacritics in apachesolr
So, I think it was a mixture of problems/issues that arose, but they were more broad/were somewhat indirectly related to the symptoms. I'll mention the steps to fix it/figure it out:


On the web amin interface, I selected the core from the dropdown, then "Schema Browser" below it.
From there, I could tell which ACTUAL filters/tokenizers were getting loaded. The ASCIIFoldingFilterFactory was listed on the index analyzer for the text fieldtype, but not the query analyzer.
When I attempted to reload the core, it got an error, and failed. It said something about one of the diacritics already being loaded (it was talking about the mapping-ASCIILatinwhatever.txt file that I'd tried earlier)
I cleared that file, since I was trying to use a different filter, and the core was able to reload, reindex, and everything's working great now (and the filter is on the query analyzer.)


So, anyone else dealing with this issue, in suhort: Check your "Schema Browser" in the web gui for Solr on the core you're having trouble with!