For the VM
initialization to work properly, you must either call
bbdb-initialize with the vm symbol from within your VM
initialization file (`~/.vm'), or you must call
bbdb-insinuate-vm manually from within your VM initialization
file.
While it is possible to put a multi-character mark
in bbdb-message-marker-field and/or in
bbdb/gnus-summary-known-poster-mark, the resulting summary buffer
will be misaligned as a result. This misalignment will result from fact
that at this time the character used to indicate posts whose authors are
not in the BBDB is always a single character, and cannot be
changed.