"Too few arguments" PHP error when viewing FAQ

I've installed the FAQ module on a site I'm working on (actually a multisite installation, but I only have the module active on one site so far), and while I can enter FAQs like any other sort of content, and the FAQs show up OK if I click directly on the individual question (from the home page or the content area of the admin), if I try and go through the FAQ item in the menus I get a PHP error.

The main FAQ page (as in example.com/faq) shows up OK, with only the one category that I've added a test question to listed, but when I click on that category, I get the following error:

warning: sprintf() [function.sprintf]: Too few arguments in /[my web directory]/modules/faq/faq.module on line 1249.

(I edited out my web directory from the above for security reasons, though I suppose given that anyone can see the error right now there wasn't much point in that.)

Question layout is set to "Clicking on question opens/hides answer under question", I've set up three categories, though as I mentioned only one has any content as of yet, and the category layout is set to "Clicking on category opens the questions/answers in a new page". However, when I tried setting the question layout back to "Questions inline" just to see if the layout was a factor, it didn't help -- I still got the same error.

The test site is at http://drupal.wcc.on.ca if anyone wants to take a look.