I have an issue with creating/editing K2 items on the front end.

If I choose to edit an item from the front end ... the edit screen comes up in a pop-up (lightbox?) window (fine).

But when I click Close the web site sometimes redraws in the popup rather than the popup closing.

(I just tried it - the first time it closed the popup, but when I chose to edit again and chose Close the web site appeared in the popup box). The popup box cannot be closed (if I click the X nothing happens.)

Any ideas what might be causing this problem?