Here's a screenshot of the server crashing.
*click* The shot is a little hi-res and is about 212k, so sorry for anyone on a slow connection, but I wanted it to be readable...
In the screenshot you can see in the Questnet text display where the first line of text is stored fine, so it's not a coding issue. I believe Questnet also does this with the more obvious signs like # and $, though you may want to check others if you plan on adding a fix.
You can also notice the debug log window has a little new text it's scrolled, which is probably the previously mentioned "Line parameter <User.RNETitlePreview[userid]; $removeformatting(Using percent signs crashes quest see % ?)$> has missing %"