bzr-svn checksum mismatch

[ashuai]

d:\>bzr pull -r 703
Using saved parent location: svn://***
bzr: ERROR: bzrlib.errors.NoSuchRevision: SvnRepository('svn://***') has no revisi
on svn-v4:7f9941ff-4b98-8142-92fd-2e38e075ec9b::703

Traceback (most recent call last):
  File "bzrlib\commands.pyo", line 842, in exception_to_return_code
  File "bzrlib\commands.pyo", line 1037, in run_bzr
  File "bzrlib\commands.pyo", line 654, in run_argv_aliases
  File "bzrlib\builtins.pyo", line 1017, in run
  File "bzrlib\decorators.pyo", line 192, in write_locked
  File "bzrlib\workingtree.pyo", line 1611, in pull
  File "bzrlib\decorators.pyo", line 192, in write_locked
  File "bzrlib\branch.pyo", line 948, in pull
  File "D:/lib/bzr/plugins\svn\branch.py", line 731, in pull
  File "D:/lib/bzr/plugins\svn\branch.py", line 666, in update_revisions
  File "D:/lib/bzr/plugins\svn\fetch.py", line 1288, in fetch
NoSuchRevision: SvnRepository('svn://***') has no revision svn-v4:7f9941ff-4b98-81
42-92fd-2e38e075ec9b::703

bzr 2.0.1 on python 2.5.4 (Windows-32bit)
arguments: ['bzr', 'pull', '-r', '703']
encoding: 'cp936', fsenc: 'mbcs', lang: None
plugins:
  bzrtools D:\lib\bzr\plugins\bzrtools [2.0.1]
  explorer D:\lib\bzr\plugins\explorer [0.8.3]
  launchpad D:\lib\bzr\plugins\launchpad [2.0.1]
  netrc_credential_store D:\lib\bzr\plugins\netrc_credential_store [2.0.1]
  qbzr D:\lib\bzr\plugins\qbzr [0.14.4]
  rebase D:\lib\bzr\plugins\rebase [0.5.4]
  svn D:\lib\bzr\plugins\svn [1.0.1]
  upload D:\lib\bzr\plugins\upload [1.0.0dev]
  xmloutput D:\lib\bzr\plugins\xmloutput [0.8.5]

*** Bazaar has encountered an internal error. This probably indicates a
    bug in Bazaar. You can help us fix it by filing a bug report at
        https://bugs.launchpad.net/bzr/+filebug
    including this traceback and a description of the problem.

d:\>bzr pull
Using saved parent location: svn://***
bzr: ERROR: base checksum mismatch: '366e51d3fd047acdfd646ddf9f5e7c16' != '1e101db43a1d2197f4e1fe03c
e790463' in svn-v4:7f9941ff-4b98-8142-92fd-2e38e075ec9b::703 (:703)