Comment 1 for bug 134684

As the boost libraries also contain the version in the package name, upgrading boost will force to rebuild all packages depending on boost libraries.
Ubuntu is also now in upstream version freeze (UVF), which means one needs to get an exception to include this new upstream version in gutsy now.

Can you list some good reasons (or bug numbers which get fixed with this new upstream version) why upgrading boost is worth getting an UVF exception and rebuilding all depending packages?