Thank you for reaching out. We are aware of this bug and the workaround you found is a viable solution. I created this page where you can track its progress where our workaround is also offered: http://feedback.telerik.com/Project/108/Feedback/Details/129175. The key difference is that it uses the concrete element, and not the first such element on the page. With your approach, perhaps you can add a parent element in the jQuery selector like $("table.reLayoutWrapper", editor.get_element()).height(myNewHeight); where editor is a reference to the RadEditor object.
Please accept my apologies for the inconvenience caused.
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