OK, I have reverse engineered the site notice. A non-Javascript user
must apparently do the following to see it, else a better method would
be mentioned in a <noscript>.
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$ w3m -dump_source \
http://upload.wikimedia.org/centralnotice/wikipedia/en/centralnotice.js?207… |
ascii2uni -qa 7 | perl -pwle 's/\\n/\n/g' |
perl -nlwe 'next unless /^<table/../^<\/table>/;print' | w3m -dump -T
text/html
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Maybe monitoring the URL of the source file, if any, would be less
painful. Is there a general pattern for where it is kept for all the
WMF sites?