Having same issue.  Here are the log files:
2013-03-21 20:52:42,387 31482 INFO ? openerp.service.http_server: Found user="admin", passwd="***" for db="unidem"
2013-03-21 20:52:42,464 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get length: http://192.168.0.23:8069/unidem/Documents
2013-03-21 20:52:42,475 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get contenttype: http://192.168.0.23:8069/unidem/Documents
2013-03-21 20:52:42,483 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get RT: http://192.168.0.23:8069/unidem/Documents
2013-03-21 20:52:42,488 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get etag: http://192.168.0.23:8069/unidem/Documents
2013-03-21 20:52:42,501 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get children: http://192.168.0.23:8069/unidem/Documents
2013-03-21 20:52:42,506 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: children for: Documents
2013-03-21 20:52:42,519 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: child: Admin Folder
2013-03-21 20:52:42,519 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: child: Partners
2013-03-21 20:52:42,519 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: child: Personal Folders
2013-03-21 20:52:42,520 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: child: Products
2013-03-21 20:52:42,520 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: child: Projects
2013-03-21 20:52:42,520 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: child: Sales Order
2013-03-21 20:52:42,534 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get length: http://192.168.0.23:8069/unidem/Documents/Admin Folder
2013-03-21 20:52:42,549 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get contenttype: http://192.168.0.23:8069/unidem/Documents/Admin Folder
2013-03-21 20:52:42,564 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get RT: http://192.168.0.23:8069/unidem/Documents/Admin Folder
2013-03-21 20:52:42,577 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get etag: http://192.168.0.23:8069/unidem/Documents/Admin Folder
2013-03-21 20:52:42,616 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get length: http://192.168.0.23:8069/unidem/Documents/Partners
2013-03-21 20:52:42,626 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get contenttype: http://192.168.0.23:8069/unidem/Documents/Partners
2013-03-21 20:52:42,636 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get RT: http://192.168.0.23:8069/unidem/Documents/Partners
2013-03-21 20:52:42,646 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get etag: http://192.168.0.23:8069/unidem/Documents/Partners
2013-03-21 20:52:42,677 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get length: http://192.168.0.23:8069/unidem/Documents/Personal Folders
2013-03-21 20:52:42,686 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get contenttype: http://192.168.0.23:8069/unidem/Documents/Personal Folders
2013-03-21 20:52:42,696 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get RT: http://192.168.0.23:8069/unidem/Documents/Personal Folders
2013-03-21 20:52:42,706 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get etag: http://192.168.0.23:8069/unidem/Documents/Personal Folders
2013-03-21 20:52:42,735 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get length: http://192.168.0.23:8069/unidem/Documents/Products
2013-03-21 20:52:42,744 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get contenttype: http://192.168.0.23:8069/unidem/Documents/Products
2013-03-21 20:52:42,753 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get RT: http://192.168.0.23:8069/unidem/Documents/Products
2013-03-21 20:52:42,762 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get etag: http://192.168.0.23:8069/unidem/Documents/Products
2013-03-21 20:52:42,791 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get length: http://192.168.0.23:8069/unidem/Documents/Projects
2013-03-21 20:52:42,800 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get contenttype: http://192.168.0.23:8069/unidem/Documents/Projects
2013-03-21 20:52:42,809 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get RT: http://192.168.0.23:8069/unidem/Documents/Projects
2013-03-21 20:52:42,818 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get etag: http://192.168.0.23:8069/unidem/Documents/Projects
2013-03-21 20:52:42,846 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get length: http://192.168.0.23:8069/unidem/Documents/Sales Order
2013-03-21 20:52:42,855 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get contenttype: http://192.168.0.23:8069/unidem/Documents/Sales Order
2013-03-21 20:52:42,864 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get RT: http://192.168.0.23:8069/unidem/Documents/Sales Order
2013-03-21 20:52:42,873 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: get etag: http://192.168.0.23:8069/unidem/Documents/Sales Order
2013-03-21 20:52:42,894 31482 DEBUG ? openerp.addons.document_webdav.webdav_server: "PROPFIND /unidem/Documents/ HTTP/1.1
" 207 -
2013-03-21 20:52:42,895 31482 INFO ? werkzeug: 192.168.0.118 - - [21/Mar/2013 20:52:42] "PROPFIND /webdav/unidem/Documents/ HTTP/1.1" 500 -