When you hit the arrow share button, Google+ use to launch a share dialog with option for comment and then share with your circles.
That share dialog was Okay until you scroll while the dialog is in use. You may get lost in the scroll jungle losing focus of the share dialog.
Today we noticed this nice change where once you click share button, Google+ shows share this post inline within that post, a comment box and option to select circles and share.
This way of sharing is easy to use and has better user experience when compared to the dialog method.
Checkout and share your thoughts about this change through Google+ comments below, Enjoy!.