Changes to Event comments:
As in any post one can now add photos or videos as a comment inside an Event.
The comment you make is created into a Google+ post.
When the post is shown in your desktop profile stream, there is a link on top that takes people to the Event in Question.
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Even though this new feature seems to disrupt the flow of the comments inside the Event, we can't deny that this will boost the Events in all the commenters streams.
More unwanted stuff from the people you follow or a good way to see some interesting Events coming up? I wish there was a check box like in YouTube, for not sharing the comment outside the Event...