[Plugin: The Events Calendar] Malformed URL results in 404 error with WP pretty permalinks

Hi,

Either I’m doing something wrong (most likely), or there’s a bug in how the URL’s are processed when using the combo-box navigation.

When using text navigation, my monthly calendar shows fine. When using combo box navigation, I receive 404 errors.

• I’ve verified this with the TwentyTen theme, and disabling all other plugins.
• Tested with any WP permalink structure except for “Default”
• Pretty permalnks in the plugin itself is disabled

When using the text navigation <- May 2011 / July 2011 ->, the format of the URL is as follows domain.com/category/events/?eventDate=2011-07&eventDisplay=month
When using the combo box navigation, the order of the parameters is altered, and I believe that’s where the problem lies. Note the following URL when using the combo box navigation domain.com/category/events/&eventDisplay=month&eventDate=2011-08
If you notice, not only is the order of parameters different (which ultimately isn’t a dealbreaker), but the first character following the category is an ampersand, whereas when using the text navigation it’s a question mark. If I change the ampersand to a question mark in the latter example, a 404 error is not returned and I see the large calendar I’m expecting.

Any suggestions?

http://wordpress.org/extend/plugins/the-events-calendar/