I’d like to inform you that Topobase 2009 Update 1 is available for download. It conatins a solution for this issue.
Autodesk Topobase Client 2009 Update 1
http://usa.autodesk.com/getdoc/id=DL11919605
Autodesk Topobase Web 2009 Update 1
http://usa.autodesk.com/getdoc/id=DL11919612
Regards,
eric