I am experiencing the exact same issue described here:
However I can see that a pull request has been merged to fix that issue (I double checked my capitalization anyway).
The issue is that my iframe height is not being set and seems to default to 150px
Which as you can see cuts off all but the first part of the first post. If I manually increase the iframe height I can see that all the rest of the posts are there, but hidden.
Can anyone point me in the right direction?