Steps to reproduce:
1. Open http://jsfiddle.net/2matzLja/1/show/ in Safari 8.0.3
2. Double-click on the <input>. Note that a focus ring is displayed on it.
A text cursor should be displayed in the <input>, just as with a normal has-always-been-writeable <input>.
No text cursor is displayed in the <input>.
However, you can still type in the <input>, and as soon as you type a character into the <input>, the text cursor starts being displayed.
The example's source code can be viewed at http://jsfiddle.net/2matzLja/1/
Original Bootstrap bug report: https://github.com/twbs/bootstrap/issues/16022
Related Chrome bug: https://code.google.com/p/chromium/issues/detail?id=465274
Created attachment 252551 [details]
Copy of JS Fiddle example
Also filed a Radar for this:
Still reproduces in Safari 9.0.3