Using the plugin full calendar
If I navigate from December 2012 -> January 2013 no events show up. I can change my localhost date settings to January 2013 and refresh the page the January events then show up on the first page but I cant navigate back to see the December events.
Seems to be a bug when transversing years. It appears the current year/month is permanently attached to the ajax query.
I've commented out the line
echo implode(", ", $strings);
from function footer_js()
it seemed to add some possibly unneeded queries to the ajax call. I'm only using it to display Posts - looks like you might have issues if you're using custom post types though - not sure.