Error 267 "The directory name is invalid" on pull/branch on Windoze

[Frits Jalvingh]

I have a repository which is completely usable from Linux without problems. 
But some members of the team still run Windows and get the following error 
since this morning:

C:\>bzr branch bzr://172.22.128.28/wsdomui

bzr: ERROR: [Error 267] De mapnaam is ongeldig:
u'C:/wsdomui/.bzr/checkout/limbo/new-9/src/nl/itris/viewpoint/bp/con'

This happens for both branch and pull, and it happens both in a new unshared 
directory and in a shared directory. I did a bzr check in the source 
directory and that did not show any errors:

jal at cite:~/bzrws/wsdomui$ bzr check
checked branch file:///home/jal/bzrws/wsdomui/ format Bazaar Branch Format 6 
(bzr 0.15)
checked repository <bzrlib.transport.local.LocalTransport 
url=file:///home/jal/bzrws/> format <RepositoryFormatKnitPack4>
   499 revisions
 25245 file-ids
 24021 unique file texts
1482431 repeated file texts
     0 unreferenced text versions

I upgraded bzr from 1.4 to 1.5 but that did not fix the problem.

Any hope of resolving this?

Greetings,

Frits