The Bazaar revno's differ from the Subversion revno's
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That's right. Bazaar revision numbers are per-branch, whereas Subversion revno's are per-repository.
+
+=========================================================================
+Bazaar reports branches have diverged while pulling, when they haven't
+=========================================================================
+As of version 0.4, bzr-svn creates revisions with different revision ids than
+previous versions. In other words, existing bzr-svn branches created with
+0.3.x can not be used directly with 0.4.0 but will have to be upgraded to
+work with 0.4.0 using the "bzr svn-upgrade" command. The bzr-rebase package
+has to be installed for this command to work correctly.