It appears Apple plans to fix a long-standing keyboard issue which caused users to inadvertently tap the period key when aiming for the space bar in Safari. As noted by MacRumors, beta versions of iOS 8.3 feature a design change that should resolve the problem.
In 8.3, Apple has made the space bar longer on the keyboard that pops up when inputting text in Safari's omnibar, and the 'Go' button shorter. This should make it less likely for users to encounter accidental period key presses when typing out their web searches.