Originally Posted by allill 
Did it say "debug" all the way accross the screen or just in a corner?
Like Smigol said, it is only in the upper left corner. I did some of my testing in fairly dark conditions and didn't think the LCD was bothersome. YMMV. Of course it makes more sense to me to be able to turn it off unless you intend to make adjustments for different lenses (or conditions). I found that all of the lenses I routinely use (the only ones tested) were all OK at the adjusted setting that was set for my 50-135.
Brian