ray parkes on "[Theme: Catalog Me!] menu bounces on phones"

Hi
I have a problem with the menu on small devices that use the menu button. The menu button triggers the menu which slides out but it then bounces usually several times and sometimes disappears. I can reproduce the problem with a mouse if I narrow the screen. It doesn't always happen but often enough to be annoying make the theme unusable which is a shame because I like it. I have added some css to the head container to remove lines that appear there but taking that off makes no difference
http://led123.co.nz