Re: Found more activity stream issues in BP 1.5 – Is it just me?
I can definitely recreate this on 3 installs now, the latest being a vanilla install of just WP and BP
Here is what you do.
-Create a new post
-before typing any text, insert a picture and give it a caption
-you can type anything you want now and then publish the post
Basically the picture has to come at the start of the post, so that the [/caption] shortcode is within the character limit of the excerpt.
If you have a post with a picture further down the post, it will be outside of the excerpt character length and you will be okay.
If you want me to make a screen cast, let me know and I’ll knock one up to show you.
As long as your picture is at the top of the post, you’ll 100% see what I mean.
Let me know dude 
