I just got my new Kindle PaperWhite (Wifi). Every time I turn the page I see the screen glitch (some thing like blur) for fraction second irrespective whether the page has image or not. Is this in all the devices or could it be a factory defect? Or is there any settings to change it?
From the User's guide:
Understanding Kindle display technology
Your Kindle uses a high-resolution display technology called electronic paper. The display is reflective, which means you can read it clearly even in bright sunlight. Electronic paper uses ink just like books and newspapers, but it displays the ink particles electronically.
On occasion, your screen may seem to flash. This is part of the process of updating the e-reader display. By default, your Kindle features fast, smooth page turns, minimizing the number of flashes. To refresh the page with every page turn, from the Home screen tap the Menu button and select Settings. Tap Reading Options and use the Page Refresh setting to set your preference. For manga refresh settings, tap the Menu button when reading a manga book and select the Page Refresh On/Off setting.
So, I guess it's common for all devices. My Paperwhite 2 has it too.