We see this problem mostly on Firefox, Chrome and Safari, but not IE or Opera.
It seems that various actions cause BLUR and FOCUS events to fire even though they don't seem like they ought to (the focus is still in the CKEditor instance).
We see these fire rapidaly on a PASTE operation.
We see these fire rapidly on a RIGHT-CLICK in a TABLE CELL (to bring up the table context menu).
Why are these actions within the editor considered to create BLUR and FOCUS events?