I will look into it. Can you send me a screenshot showing the behavior you don't like (robert -at- fifesoft dot com)? Do you mean the small margin between the top of the editor and the first line? There is certainly some property to change that, insets or border or something, I'll have to look into it to see what it is.
Does this behavior only happen when using RSTA as a table renderer/editor, or even when using it as a standard text area?