svn import fails -- "Can't convert string from 'UTF-8' to native encoding"

Not my project (or import request) but I noticed that the import for lp:~vcs-imports/blueproximity/trunk has been constantly failing since whoever it was set it up. The importer obviously doesn't like the utf-8 encoded filename 'Übersetzungen.txt' which is present in their svn repo.

https://code.launchpad.net/blueproximity

Traceback (most recent call last):
  File "/srv/importd.launchpad.net/production/launchpad-rev-7763/scripts/code-import-worker.py", line 46, in ?
    script.main()
  File "/srv/importd.launchpad.net/production/launchpad-rev-7763/scripts/code-import-worker.py", line 41, in main
    import_worker.run()
  File "/srv/importd.launchpad.net/production/launchpad-rev-7763/utilities/../lib/canonical/codehosting/codeimport/worker.py", line 371, in run
    foreign_tree = self.getForeignTree()
  File "/srv/importd.launchpad.net/production/launchpad-rev-7763/utilities/../lib/canonical/codehosting/codeimport/worker.py", line 296, in getForeignTree
    return self.foreign_tree_store.fetch(
  File "/srv/importd.launchpad.net/production/launchpad-rev-7763/utilities/../lib/canonical/codehosting/codeimport/worker.py", line 229, in fetch
    return self.fetchFromSource(source_details, target_path)
  File "/srv/importd.launchpad.net/production/launchpad-rev-7763/utilities/../lib/canonical/codehosting/codeimport/worker.py", line 234, in fetchFromSource
    branch.checkout()
  File "/srv/importd.launchpad.net/production/launchpad-rev-7763/utilities/../lib/canonical/codehosting/codeimport/foreigntree.py", line 59, in checkout
    svn_client.checkout(
pysvn._pysvn_2_4.ClientError: Can't convert string from 'UTF-8' to native encoding:
foreign_working_tree/?\195?\156bersetzungen.txt
Import failed:
Traceback (most recent call last):
Failure: twisted.internet.error.ProcessTerminated: A process has ended with a probable error condition: process ended with exit code 1.

[SRC] http://launchpadlibrarian.net/23532975/blueproximity-trunk-log.txt