Bug#568389: It *is* possible

[Andreas Heinlein]

File change notification is part of the CIFS spec, as can be seen here:
http://www.snia.org/tech_activities/CIFS/CIFS-TR-1p00_FINAL.pdf

or here:
http://msdn.microsoft.com/en-us/library/aa365233%28VS.85%29.aspx

All Windows server starting from at least Windows 2000 support it, Samba
supports it as well. Windows Explorer makes use of this feature and
behaves as the bug reporter expected.

This is most likely an upstream bug and should be filed there.