On http://bugs.debian.org/cgi-bin/pkgreport.cgi?src=mdbtools one can read
"You may want to refer to the following individual bug pages: libmdbodbc, libmdbtools, mdbtools-dev, mdbtools-gmdb."
It should read
"You may want to refer to the following individual bug pages: libmdbodbc, libmdbtools, mdbtools, mdbtools-dev, mdbtools-gmdb."
with all 5 binary packages of that source package "mdbtools".
Maybe the BTS gets confused by the fact that this binary package has the same name than its package source?