The storylen field of Omnibus titles can be set to the value of "None". This can happen when editing a publication without a "reference" title, i.e. a title whose title type matches the type of the publication. If one of the Content titles is an Omnibus, then the page defaults the "Length" field to the value of "None".
Anonymous
Fixed in edit/editpub.py 1.31. Installed in r2014-138 on 2014-03-09. Closing.