[Plugin: Ajax Event Calendar] Month drop down list overlaps date

Hello

Great plugin. I have a cosmetic issue in that the date drop down list overlaps the date heading on my calendar. Please take a look here http://guernseycraft.com/event-calendar

I imagine I need to tweak something in the custom css file but I am not exactly sure what to tweak and where exactly to find it. Please could someone point me in the right direction? I have been looking everywhere for a solution before posting here.

Thanks

Martine

http://wordpress.org/extend/plugins/ajax-event-calendar/