Problem exists in the nightly build downloaded 1-28-2010 and in 1.2.2 stable

tr@FI1167 /c/mh/mongodb-win32-i386-2010-01-28/bin
$ mongo --port 27333

MongoDB shell version: 1.3.2-
url: test
connecting to: 127.0.0.1:27333/test
type "exit" to exit
type "help" for help
> show dbs
assert: assert failed : listDatabases failed

tr@FI1167 /c/mh/mongodb-win32-i386-2010-01-28/bin
$

Followed by the classic: "mongo.exe has encountered a problem and needs to close" error dialog.

Server log output is:

Thu Jan 28 14:35:27 connection accepted from 127.0.0.1:3462 #80
Thu Jan 28 14:35:29 User Exception 10045:unauthorized
Thu Jan 28 14:36:20 MessagingPort recv() errno:0 No error 127.0.0.1:3462
Thu Jan 28 14:36:21 end connection 127.0.0.1:3462