mozilla-b2g/gaia — pull request #15844 by jrburke (2014-01-30 21:55:02+00:00)
Title: Bug 965363 - [B2G][Clock] The tab selection bar is selectable through the create an alarm page

The card was just not long enough to cover the screen behind it. Perhaps the header changed size at some point. Just making the card long fixed the issue.