error msg -- error in SQL syntax

Upon submitting a mail item, following error is received:
user error: You have an error in your SQL syntax. Check the manual that corresponds to your MySQL server version for the right syntax to use near 'Leigh's to do" and then either leave the body blank or just exp
query: UPDATE mine_node SET body = "

This email was sent to users with the following roles: Staff - all

(then followed the text)

in /home/dajudge2/public_html/dr/mine/includes/database.mysql.inc on line 125.

warning: Cannot modify header information - headers already sent by (output started at /home/dajudge2/public_html/dr/mine/includes/common.inc:406) in /home/dajudge2/public_html/dr/mine/includes/common.inc on line 217.

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The area of the text of the message referenced above is:
something like "Leigh's to do" and then

Is it the use of the full quote marks that made it choke? Or is there a code problem?
In fact, the email was sent and looks fine.

gil