If you try to open the image's URL Google returns a 414 error with the
message "Request-URI Too Large". The URL in question is only 2153
character long so this seems to be in direct disagreement with the FAQ
(http://code.google.com/apis/chart/faq.html#url_length) which states:
  "The maximum length of a URL is not determined by the Google Chart
API, but rather by web browser and web server considerations.
Currently, URLs that are over 2048 characters in length when URL-
encoded (e.g., | becomes %7C) are not recommended."
So I'd like to ask that the limit be lifted or the FAQ be updated.