Glo Uneven Backlight

Hi folks,

First post so be gentle!
Just stepped boldly into the world of e-readers today and picked myself up a Kobo Glo.

Generally very impressed but when I turn on the backlight it seems to be unevenly lit at the bottom (see below). I just wondered if this was normal or if I've got myself a defective device. I know it's not major, but I'm clearly very anal! Also it's worse than the pictures make it look.





Please let me know what you think folks!