I took 10 random DOIs from en.wiki.
You can see the results here.
10.1038/scientificamerican0200-90 still not working. - due to 401 at website pointing to log-in only .pdf. Not sure there's much we can do here.
10.2307/3677029 still says "JSTOR: An Error Occurred Setting Your User Cookie" . Forked to T93877
10.1542/peds.2007-2362 still gives " Check date values in: |date= (help)" . Forked to T95016
Hope this helps.