I ask, because I think this may be part of the problems we have seen with showcase:
Below is a dump of the URI's for a project I did which shows the URI changing between versions which seems to happen when I save the version but am not logged into Squeakland.
$ for f in Chaos*.pr ; do echo "$f"; unzip -c "$f" manifest | tr '\r' '\n' | egrep "URI|user"; done Chaos Game II.003.pr prev-URI: http://squeakland.org/etoys/mrsteve-3456959366 URI: http://squeakland.org/etoys/mrsteve-s1282039561 user: mrsteve Chaos Game II.004.pr prev-URI: http://squeakland.org/etoys/mrsteve-3456959366 URI: http://squeakland.org/etoys/mrsteve-s1282039561 user: mrsteve Chaos Game II.005.pr prev-URI: http://squeakland.org/etoys/mrsteve-3456959366 URI: http://squeakland.org/etoys/mrsteve-s1282039561 user: mrsteve Chaos Game II.006.pr prev-URI: http://squeakland.org/etoys/mrsteve-s1282039561 URI: http://squeakland.org/etoys/unknown-3457719104 user: unknown Chaos Game II.007.pr prev-URI: http://squeakland.org/etoys/mrsteve-s1282039561 URI: http://squeakland.org/etoys/unknown-3457719550 user: unknown Chaos Game II.008.pr prev-URI: http://squeakland.org/etoys/mrsteve-s1282039561 URI: http://squeakland.org/etoys/unknown-3457721470 user: unknown Chaos Game II.009.pr prev-URI: http://squeakland.org/etoys/mrsteve-s1282039561 URI: http://squeakland.org/etoys/unknown-3457724052 user: unknown Chaos Game II.010.pr prev-URI: http://squeakland.org/etoys/mrsteve-s1282039561 URI: http://squeakland.org/etoys/unknown-3457725224 user: unknown Chaos Game II.011.pr prev-URI: http://squeakland.org/etoys/mrsteve-s1282039561 URI: http://squeakland.org/etoys/unknown-3457727194 user: unknown Chaos Game II.012.pr prev-URI: http://squeakland.org/etoys/mrsteve-s1282039561 URI: http://squeakland.org/etoys/unknown-3457727944 user: unknown Chaos Game II.013.pr prev-URI: http://squeakland.org/etoys/mrsteve-s1282039561 URI: http://squeakland.org/etoys/unknown-3457729879 user: unknown Chaos Game II.014.pr prev-URI: http://squeakland.org/etoys/mrsteve-s1282039561 URI: http://squeakland.org/etoys/unknown-3457729879 user: unknown Chaos Game II.015.pr prev-URI: http://squeakland.org/etoys/unknown-3457729879 URI: http://squeakland.org/etoys/mrsteve-3457729879 user: mrsteve