if you look at the main blog page for the data dump post (pic below) you see that there are no line breaks in the excerpt. its all smashed into one paragraph. Yet if you follow the link to the actual content post it has line breaks (pic 2 below)
http://harguess.com/images/one.png
http://harguess.com/images/two.png
This can clearly be seen in the FGS posts
http://harguess.com/images/three.png
http://harguess.com/images/four.png
The truncation only appears to be an issue only with excerpts. also it seems to be stripping the hyperlinks and possibly other html tags.