Basically anytime I load my UserCP page (and sometimes other pages), the Boards.ie menu drops down as if I had hovered my mouse over it or (in the case of the iPad) tapped on it - even though my cursor wouldn't be anywhere near it. This is particularly annoying in the case of the iPad as you have to tap on an another menu to get rid of it.
I’ve had this problem with Safari/Chrome on my Mac since upgrading to 10.7 and on my iPhone/iPad since upgrading to iOS 5. All other websites are fine from what I can see.
Feedback thread about this here in which a user running Chrome on Windows reports the same issue.