[boost] [Graph] Are there significant updates to the Graph library in 1.34?

I'm about have a chance to apply the Graph library in my work. Nothing fancy but a DAG is needed to ensure relationships amongst objects of a certain type and groups of those objects. The feature allows both objects and object groups to be members of another group, which may in turn be contained in some other groups. A group cannot have itself as a member, thus denying recursive containment. Nor can a contained group turn around having its container group as its member, etc. The latest stable release is 1.33, and its release notes claim introduction of new algorithms and improvement of existing algorithms. My question is whether 1.34 will have similar changes over 1.33.