dbcase2.js failing with "db already exists with different case other"

MongoDB shell version: 2.3.1-pre-

connecting to: 127.0.0.1:27999/test

true

Sat Nov 17 10:27:08.783 exec error: src/mongo/shell/query.js:180 count failed: {

	"assertion" : "db already exists with different case other: [dbcasetest_dbnameA] me [dbcasetest_dbnamea]",

	"assertionCode" : 13297,

	"errmsg" : "db assertion failure",

	"ok" : 0

}

throw "count failed: " + tojson( res );

                       ^

failed to load: /home/yellow/buildslave/Linux_64bit_DEBUG/mongo/jstests/dbcase2.js