Text disappears in subclass of NSTextFieldCell

Question

I've spent many hours trying to figure this one out with no luck. Someone had a similar problem on the Apple mailing lists a while ago and no one answered. Basically, it comes down to this: I've subclassed NSTextFieldCell and overridden the drawWithFrame: method to create a custom bezel. Then I call drawInteriorWithFrame: at the end of the method to draw the text. Everything works perfectly except for the fact that sometimes the text disappears. Everything else is drawn, except for the text. I think it might have something to do with the field editor, but I really don't know. Has anyone run into this problem before?