Strange ... pidgin build-depends on libhildon-extras1-dev (>= 0.9.3), but the resulting binary package does not. It depends simply on libhildon-extras1 (any version), which is bad, because, when built, it should be calculated to depend on libhildon-extras1 (>= 0.9.3) ... maybe there's something missing from libhildon-extras ...