I am using TinyMCE 4.06 in an IE8 environment. For some reason the page-up, page-down, and delete keys are not having any effect. The backspace key works fine, so you can still delete things if you have to, and the scroll bar works fine from the mouse so you can still scroll up and down the document without the page keys, but it is extremely annoying. Anybody have an idea why this might be happening? Or what I could do to diagnose/fix the problem?