I have 2 portals with the wiki in them, and if the entry gets modified, often new line breaks (real <br> tags) are added. This for example causes bulleted lists, that originally look like this

• line1
• line2

to afterwards look like this

• line1
• line2

Which is really anoying, because of course the user doesn't know about this, and only quickly wanted to update the item. I assume I'm not the only one experiencing this. If you would like to see it yourself, one of our sites is www.wein8.ch - requires registration. As you see, we're using the list extensively, but with this big side effect:

http://www.wein8.ch/Wikif%C3%BCrdieAktuellewein8Ausgabe/tabid/64/Default.aspx

As a side note: we're using the telerik rad-editor, though I believe the issue only occurs in the wiki, so I don't think the WYSIWYG editor is causing the problem.