This is a small – in fact very small – release for most of us. However, it is a very big one for my wife. She has the problem on her iPad that this release is supposedly going to fix. We will see.
For something that is showing as only one thing fixed, at 2.05 GB (for an iPhone, and 1.9 GB for iPad) it is still a lot of code – maybe a lot of security fixes?
I have updated my iPhone 6s / iPad Air with no issues. I will let you know if this solves the problem it suggests it will fix after my wife updates her iPad. Update: my wife updated her older iPad that had the link issue and this update of 9.3.1 fixed that issue. I know it was supposed to but very glad it did!
• Fixes an issue that caused apps to be unresponsive after tapping on links in Safari and other apps
For information on the security content of this update, please visit this website: http://support.apple.com/kb/HT1222