I tested http://cea4autism.org/ on a iphone and my drop down menu did not open.
At first I thought this issue was related to mobile browsers. Then I tested on an iPad and it did work. This confused me!
I just tested on my computer and made the browser window small. The menu did not open.
It happens when the menu pops up to the top right and gets slightly smaller. This seems to be when the window is about 610 pixels wide.
Any ideas on how to fix this?

Also any suggestions on how to handle the menu on really small screens such as phones, it starts to flow to 2 rows when the window gets down to 400 pixels wide