This concerns when using the wysiwyg.
Now be aware that the wysiwyg is javascript and that javascript is parsed (or in normal words: reading the code and giving a nice output on your screen)
by the browser so don't ask questions like "FF doesn't have spaces, but IE does". Because that's due to the browser. There's nothing we can do about this.
Some additional clarification:
When pressing enter in IE, the javascript will make new lines by making paragraphs <p></p>
While in FF it'll use
obviously those 2 aren't the same tags and thus they do create a different look.
You can always use css to alter the defination for space of <p> of
