Re: 2.0rc2 How to: disable double spacing in WYSIWYG editor
I checked the wysiwyg editor in Tikiwiki 2.0rc4 and found the text to be single-spaced but the text could look double-spaced if the stylesheet specifies a large line-height for paragraphs. What theme are you using? You check its setting for p (paragraph) and see if it has a line-height property. If it does you could reduce it. If not maybe you should look at the finished page using the Firebug add-on for Firefox to examine the text properties for some clue.
-- Gary