I don't know how wide spread any problems might be but just thought I'd let you know that it has caused havoc with my display. I have an iPad gen 4 16GIG
 
eg. I was using Adobe Reader.(also recently updated) screen elements freezing inside others, partial text displaying, flashing between two connected screen elements over and over, inability to close the program, change to any other or turn the iPad off.
 
I was eventually able to turn the screen off and after about 5 minutes came back and despite the screen havoc still occurring within Adobe I was able to turn the iPad off via its main power button. on restart everything OK
 
No recurrence yet but its the first time something significant enough has occurred after an update/ 

My daughter's phone bricked with the latest update and she's been working with tech support to try and solve it.
 
I moved from Android to an iPhone 6 about a month and a half ago.
 
I miss my Android.

My first iPhone was a 4s then went to a Samsung S2 and now an iPhone 5c. I live in a rural area and not all phones and carriers are created equal.

I think my next phone will be with a bigger screen but morph for another 12 months.