https://groups.google.com/forum/?fromgroups#!topic/jenkinsci-users/Im7IBwUqWUc

jenkns version 1.467

problem:

project uses rootPOM path spec such as
parent/child/pom.xml

if you edit job config after change rootPOM entry looks fine

after jenkins restart, if you edit job config now,
rootPOM entry looks empty, despite appropriate entry
is present OK in job/config.xml and job builds fine;

if you now merely edit and save job config,
the rootPOM entry is lost in job/config.xml
and job does not build any more