I'm having problems with PDB files (debug symbols) not being "installed" to the target directory when building Boost with shared (DLL) linkage. The PDB files are generated beneath the "bin.v2" folder, but for some reason not copied together with the DLLs to the to the target directory.

Steps to reproduce:
bootstrap
b2 link=shared toolset=msvc-11.0 variant=debug install-proper

Is this caused by a bug in the build system or do I need to configure a missing build parameter somehow?