No, not weird at all. Think about what a polarizing lens does - it's like a million microscopic parallel lines running one direction. When you have 2 lenses (screen and sunglasses), rotating one or the other so the lines are perpendicular to each other causes the image to black out. If the lines are all running in the same direction, there's no interference.
Yup. I'm guessing that the N7 is just polarized differently from what the OP is used to.
Similarly, if a person's glasses polarize the light differently than another's, the "bad" orientation will vary.
This^
I only wear polarized sunglasses when protecting my eyes from water glare. Many cars have ploarized windows that look blotchy when wearing Polarized sunglasses. I never wear them when riding my motorcycle because they can block puddles of water and pot holes from being seen in the road. I can't see the radio display in the car when wearing them either.
Get another pair of glasses with good coatings.
Yeah, the main reason to use polarized glasses is to see through reflections on glass or water. Polarized glasses are VERY popular with fishermen for this reason.
I saw this brought up in this forum previously and in other forums, with polarized glasses being an issue. I wear a pair of polarized glasses while driving almost every day. I also use the nexus 7 almost exclusively in my car, and its always locked in landscape mode. I haven't had any issues with being able to use it or seeing the screen in any app. Everything seems to display fine for me?
Your glasses might be polarized in a different orientation than the OP.
And in general: While it is theoretically possible for an LCD screen to generate circular-polarized light, it would require an additional precision layer IN FRONT of the outermost polarizer of the screen. (Putting the layer in between the LCD's polarizers would render it nonfunctional.) This is the same technique used by circular polarizers for autofocus cameras - polarized light screws up AF sensors, so CP filters consist of:
1) A standard linear polarizer, so that the filter reacts to incoming polarized light just like a normal linear polarizing filter would
2) An additional optical layer between the camera and the linear polarizer that converts the linearly polarized light to circularly polarized light
A layer that meets the needs for layer 2) on a 7" screen would be prohibitively expensive - in order to not cause visual artifacts it would likely be as expensive as the device if not more expensive.
