Biggest problem with a Bridge, for me....if you browsing pictures in View/Full Screen View (or press a space) picture are not sharp unless you click on it. Before I discovered this, I deleted lots of pictures, check my lenses.........several years ago.
I've noticed the same. I presume this is done for reasons of speed: it takes a LOT of processing power to resample images to an arbitrary size, and to do that for an entire directory, you'd be waiting a long time to see the thumbnails.
Perhaps one of the Bridge developers can weigh in here and tell me if I'm guessing correctly, or smoking crack as usual.