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Just for the record, the line you want to edit to fix the calendar links in wp-includes/template-functions-links.php is line number 104, in the get_day_link function. For the text to insert, see Curioso’s post above.

@ringmaster:
Thanks for your response. You’re right, I had overlooked your earlier posting on the topic. However, I don’t think that the “here document” (<<<) syntax is the problem in this case. I made the changes you suggested, and now I get a slightly different error message displayed in the same place as before:
Fatal error: Call to undefined function: add_action() in [my site root]/wp-content/plugins/exhibit10.php(227) : eval()'d code on line 2

I also tried using the “here document” syntax in another test PHP script on the same server (Dreamhost, which runs PHP4.3.4), and it worked fine. Any other ideas?

After installing WordPress 1.2 and Exhibit 1.0c, everything seems to work fine, except that I get an error message in the Exhibit box on the edit page that says:
Fatal error: Call to undefined function: add_action() in [my site root]/wp-content/plugins/exhibit10.php(227) : eval()'d code on line 1
I’ve seen other people post this error, but no one’s ever responded with a solution. Any ideas?