I tried the Zenpage theme. With the printNewsReadMoreLink present it shows the link to the rest of the article (past the pagebreak), but also when the article is short and has no pagebreak. When I remove the printNewsReadMoreLink from the news.php template, no read more link is shown. In that case I have to click on the title to read the rest.
I set the lenght of the news article at 5000.
I'm getting hopeless :-). I can't imagine what could be wrong. Like I said, a new 1.3 install, using the standard zenpage theme for testing, and no seperate readmore link present. I just can't get the automatic read more link to be shown. Some posts have a page break, some don't. Some are long, some short. When I view the source of the newspages, there is no hidden read more link visible. I know you can only test it for yourself, but perhaps some other users encountered this same problem.
The host is using MySQL 5.0.45 and PHP 5.2.13 by the way.