Just checked in game for 
 and its a no go.
If I add a button with OnPress="say Hello
say there"
I get this in game
Hello & #xA
there
For more info on 
 and other encodes you can check out
www.w3.orc
http://www.w3.org/TR/2000/WD-xml-c14...19.html#syntax
and
http://www.w3.org/TR/2000/WD-xml-c14...l#charescaping
You guys probably use a inhouse parsers but for the sake of us people making applications that do not have access to your parser, it would be nice if your parser recognized some transformations on white-space that we have to deal with.