I will tell you about my experience some time after watching a 3d film which I won't mention...
It started with normal films on my lcd. I could see the difference, as if I could somehow sense the depth of 2d movie in a way I couldn't before. This happened also with one 2d drawn betting chip with some shading that I was cropping at work. One more item that gave the same feeling was the hologram sticker on a nokia battery, I could never tell what was the big fuss about hologram stickers, as I could never see the hologram in 3d before, it was always just a smudge.
These symptoms have ceased after some time, but I can still see the hologram in '3d', the way I couldn't before. It's nice to read that these symptoms can exist, now I know it wasn't all just in my mind...