db.serverStatus() returns databases that only differs in case.

# mongo --port 27018 --eval "printjson(db.serverStatus())"| grep -i 773AACB7-CA2A-4473-BE3E-04A3F9F4705B
                "metadata_773aacb7-ca2a-4473-be3e-04a3f9f4705b" : {
                "metadata_773AACB7-CA2A-4473-BE3E-04A3F9F4705B" : {
                "metadata_773aacb7-Ca2a-4473-be3e-04a3f9f4705b" : {
                "metadata_773aacb7-ca2a-4473-be3e-04a3f9f4705b" : {

We can fix this problem by restarting mongod, but then after a while new duplicate database names will appear in db.serverStatus again. It is not always the same database that has duplicate names. We are not sure how to reproduce this.

It should be noted that listDatabases always returns only one when there is a case difference, and on the file system there is only one database (Linux).

 mongo --port 27018 --eval "printjson(db.runCommand( { listDatabases: 1 } ))" admin|grep -i 773AACB7-CA2A-4473-BE3E-04A3F9F4705B
                        "name" : "metadata_773aacb7-ca2a-4473-be3e-04a3f9f4705b",

This is on a standalone server, not sharded, not in a replica set. Commands are issued directly to the mongod instance.
We are running 2.4.8 at the moment.

Let me know if there is anything else I can do.

Regards,
Oskar Liljeblad