The OO rebus represents a diaresis; specifically, it's the diaresis over the I in NAÏVE. The title is a reference to the preponderance of diaresis in the New Yorker's articles.
I didn't notice that I had changed STOOL to STOLS after I got ALVIN and SEES in there. Got the spelling error and then FOFL I threw in the OO rebus and everything was good. Fun puzzle!