Please post a plunker reproducing the issue so people can look into fixing it.

A PR fixing the issue would be nice if you have found a reproducible bug.

sorry for seeming daft, but I've never made a plunkr. Do you have a good sample using angular-ui-tinymce unto which I could then build upon?

@deeg If debounce is set to 'false', no dirty-check is made before updating the view. Therefore, the editor is considered dirty by default if any of the events ('ExecCommand change NodeChange ObjectResized') are triggered. Take a look at 'debouncedUpdate', which performs a dirty-check.
https://github.com/angular-ui/ui-tinymce/blob/master/src/tinymce.js#L95-L102

A tested patch:

// Update model when:
// - a button has been clicked [ExecCommand]
// - the editor content has been modified [change]
// - the node has changed [NodeChange]
// - an object has been resized (table, image) [ObjectResized]
ed.on('ExecCommand change NodeChange ObjectResized', function () {
    if (options.debounce) debouncedUpdate(ed);
    else if (ed.isDirty()) {
        ed.save();
        updateView(ed);
    }
});