when doing the next release, please drop src/config.h from the release tarball. config.h is autogenerated when configure is run. The problem with the debian package is, that it performs an out-of-tree build (calls configure from a different location). As a result, there are two config.h in the compiler's search path. By accident, the one in the src gets picked up by the compiler.
As a result, the pathes, e.g. DATADIR, do not match the ones from the configure call, and hence the bank files / documentation is tried to fetch from a different location.
Cheers and thanks a lot for rakarrack,
P.S.: Debian bugreport at http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=632149