Which PHP version are you using? It seems that the microformats plugin requires PHP at least 5.0, because the range() command has added the third option only in that version.
Best regards,
Garvin
# Garvin Hicking (s9y Developer)
# Did I help you? Consider making me happy: http://wishes.garv.in/
# or use my PayPal account "paypal {at} supergarv (dot) de"
# My "other" hobby: http://flickr.garv.in/
Sorry, I was not aware of that. I'm using PHP5 for development, and I'm thinking about restricting this plugin to PHP5 only. Because there are some small issues that can be solved so much easier with PHP5.
In this case, you can try a quick fix and replace line 249 in the mentioned file with this code: