I don't remember there being a capcha for Twitter, but then again, I
signed up a couple of years ago.
Some capchas have characters that spin, and the user must click on each
individually. Webvism isn't able to solve them.
VICUG-L is the Visually Impaired Computer User Group List.
Archived on the World Wide Web at
http://listserv.icors.org/archives/vicug-l.html
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