Thank you! I replaced the lines you suggested with:
and now it behaves exactly as expected. Note that I did not pass a parameter to the_content() so that it will use the custom message from my more tag (as described in my first post). I also had to edit the more-link style in wp-contentthemesdisplaycssstyle*.css as follows:
background:transparent url(../images/skin3/bullet_white.png) no-repeat scroll right 15px; /* Unchanged */
padding-right: 8px; /* Added this to keep the bullet from touching the text. */
display: inline; /* Added this so it doesn't wrap the text like the default block style. */
Without the above css modification, the custom more text was displaying in block format and wrapping oddly.
Thanks, but I forgot to mention that this is happening in one of the content boxes on the home page (Mainpage column 1, which is displaying a Post). The Read more behaviour is being affected by line 140 in wp-contentthemesdisplayframeworkclasseskclass_display_box.php:
echo '<a href="'.get_permalink().'">Read more</a>';
How do I make it use the standard More behaviour?
(Edit: code formatting)