http://cdn1.appleinsider.com/13.06.17-Calendar-2.jpg
The navigation bar in general just looks like a mass of text to me most of the time, especially if there are more than two tabs:
http://www.okilla.com/uploadfile/1/2013/07/10/11373456479/13...
EDIT:
And no, I don't have similar issues on Android. Part of that could be the move to side drawers in Android apps. The greater contrast and lower reliance on lines as visual separators is definitely part of it as well.
