[niemeyer@burma ~/a]% bzr init --format=dirstate-tags
[niemeyer@burma ~/a]% bzr commit --unchanged -m="Nothing."
Committed revision 1.
[niemeyer@burma ~/a]% bzr tag foo
Created tag foo.
[niemeyer@burma ~/a]% cd ..
[niemeyer@burma ~]% bzr checkout a b
[niemeyer@burma ~/a]% cd b
[niemeyer@burma ~/b]% bzr upgrade --format=dirstate-tags
starting upgrade of file:///home/niemeyer/b/
making backup of tree history
file:///home/niemeyer/b/.bzr has been backed up to file:///home/niemeyer/b/.bzr.backup
if conversion fails, you can move this directory back to .bzr
if it succeeds, you can remove this directory if you wish
finished
[niemeyer@burma ~/b]% bzr tags
[niemeyer@burma ~/b]% bzr update
Tree is up to date at revision 1.
[niemeyer@burma ~/b]% bzr tags
[niemeyer@burma ~/b]% bzr pull ../a
No revisions to pull.
[niemeyer@burma ~/b]% bzr tags
foo <email address hidden>
Will be fixed in 0.91, but bug 138802 still exists.