Problem solved. My tempo-user-elements handler was not doing what tempo.el says it's supposed to do. It was returning an empty string instead of nil when it failed to handle the element. Changing the last line of the handler from
(t "")
to
(t nil)
gets everything to work.
How's that for a latent bug---been sitting there for 8 years....
roland
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Roland B. Roberts, PhD RL Enterprises
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