M-x org-version yields:
release_7.6-105-gbfed5
Org-mode version 7.6 (release_7.6.105.gbfed5)

When I try to export this file to html, org re-evaulates the second code
block, even though it has :cache yes

https://gist.github.com/1090173

sincerely,
--Robert McIntyre