Bruce-
Your posts somehow disable the "fully-featured" messages that some people
like to receive from the canals-list.
The best theory about this so far (Yahoo itself has been no help) is the
fact that the "charset" header in your messages is set to "windows-1252".
I've discovered by my own investigation that the charsets that work
correctly are "US-ASCII" and "iso-8859-1". (Do NOT use "iso-8859-15" -
that one fails as well).
If you can figure out how to change this, could you give it a try? (But
don't spend more than, say, 20 minutes on it - don't want to take too much
of your time.)
Let me know,
- george