I have definately noticed that text is what cues me into a LD. Sometimes when I am trying to read something in a dream (90% of the time its a newspaper, dunno why) it ALWAYS seems upside down. I flip the paper, and its still upside down. I guess this has something to do with the fact that reading and dreaming involve different parts of the brain. I've noticed, in fact, that I can never read anything in my dreams. I can't even make out letters. I usually pass it off as nothing when a flying car goes by....but its one of my two main dream signs.