Although ok, a little dysfunction in Kindle Paperwhite

the power supply is small, convenient and served its purpose quite well. But why will it forgive me so little stars for the following reason. One night I wanted to during the reading recharge my Kindle Paperwhite. book was already open and power supply was infected. all are well. But when I wanted to go to the next page has the open mini-menu for font size adjustment and with a renewed pressure on the screen, the Kindle, the font size made to one size larger or smaller. any renewed pressure on the display, the font size changes until I have taken off power supply. then have an older power supply used, and with whom I was able to kindle operate normally.

actually should a power supply do not impair the function of a device, especially since even advertised with the Kindle in the product name. If the problem would not exist so, then I would have given full marks. was also vary on whether I forgive only 2 stars. but can not rule out a manufacturing defect and perhaps others have not people, the problem with the kindle.