Black horizontal line ipad mini Safari
New iPad mini appears to be having problems already. While using Safari in some websites, a fairly thin black horizontal line will appear typically in the middle of the page. It usually gravitates towards the spot where you try to read. Thin enough to kind of underline text for easier reading but big enough to be a nuisance. Is this a feature for easier reading in Safari or a bug.
Please help,
iOS 6.0.1, iPad mini