The TinyEditor control always raises the TextChanged event when it receives focus, either because you tabbed into the field or because you clicked into it with the mouse. This event is always raised even if there is no text in the control.
Apologies for my poor report. You are correct that this only occurs the first time that the control receives focus and has text (I thought the control was empty in WYSIWYG mode but it does contain some HTML formatting. With it totally empty the problem does not occur).
I could reproduce when the TinyEditor control has a default text set in InitializeComponent and then you tab / click in it for the first time.
Can´t reproduce with an empty control or that it is always raised.
Any chance to wrap up a small test case for me ?
Thanks in advance !