Editor fails with Cannot focus a disabled or invisible window


After loading a source file by dragging it from the projects pane to the editor window the editor fails with the error message “Cannot focus a disabled or invisible window” as shown below:

I’m using Beta and the error can be reproduced. After I confirm the error-popup, normal operation resumes.
I’ve saved the toad.ell file. Please let me know if you need a copy.

Abe Kornelis.