from around line 542 - jython2.5b0/Lib/zipfile.py

st.st_mtime 7308549900279964261 for filename /tmp/tmplZoWjA/webgui/media/img/admin/inline-delete.png
 
   def write(self, filename, arcname=None, compress_type=None):
       """Put the bytes from filename into the archive under the name
       arcname."""
       st = os.stat(filename)
       print "st.st_mtime %s for filename %s" %(st.st_mtime,filename)
       mtime = time.localtime(st.st_mtime)
       date_time = mtime[0:6]

Looks like os.stat() for some of my files produces a big big number. Not sure how to recreate.