[OSX, Safari, MathJax] Problems when closing a dialog with ESC and unsaved contents

[Olek Nowodziński]

1. Open plugins/mathjax/samples/mathjax.html
2. Wait for formulas to load.
3. Double click a formula, don't change or touch anything.
4. Press ESC.

Expected: Dialog should close

Actual: Editor says that some dialog contents has been altered (but really hasn't).

5. Press ESC to get rid of the window.

Expected: Dialog should remain open (even though the prompt is invalid), cancel should prevent dialog from closing.

Actual: Sometimes another prompt is displayed which, when ESCed, sends us back to the editor. Sometimes no additional prompt is displayed but this is still invalid because dialog is closed.

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I'm unable to reproduce in other browsers/dialogs.

I managed to reproduce it with sourcedialog, randomly (see another screencast).

[Olek Nowodziński]

The video explaining the bug