I'm calling db.dropDatabase() on a master of a master slave pair on windows, and it doesn't stay deleted. Console log:

> db.getSisterDB('staging_KMI').dropDatabase()

> show dbs
STAGE_landroverKMI
STAGE_landroverRSVP
admin
landroverKMI
landroverRSVP
local
stageing_KMI
staging_KMI

> use staging_KMI
> db.dropDatabase()

> show dbs
STAGE_landroverKMI
STAGE_landroverRSVP
admin
landroverKMI
landroverRSVP
local
stageing_KMI
staging_KMI
>

Master/slave stuff

Config on the master:

"C:\Program Files\10gen\mongodb-win32-x86_64-1.6.4\bin\mongod.exe" --service --logpath c:\data\logs\mongo-master.log --logappend --master --bind_ip localhost

Log on the master:
Tue Jan 04 14:48:57 [conn201] dropDatabase staging_KMI

Slave configuration:

"C:\Program Files\10gen\mongodb-win32-x86_64-1.6.4\bin\mongod.exe" --service --logpath c:\data\logs\mongo-slave.log --logappend --dbpath c:\data\db_slave --slave --source localhost --port 27018 --bind_ip localhost

Log on the slave:

Tue Jan 04 14:48:55 [replslave] repl: applied 4 operations
Tue Jan 04 14:48:55 [replslave] repl: end sync_pullOpLog syncedTo: Jan 04 14:48:55 4d233357:1
Tue Jan 04 14:48:55 [replslave] repl: from host:localhost
Tue Jan 04 14:48:55 [replslave] An earlier initial clone of 'staging_KMI' did not complete, now resyncing.
Tue Jan 04 14:48:55 [replslave] resync: dropping database staging_KMI
Tue Jan 04 14:48:55 [replslave] resync: cloning database staging_KMI to get an initial copy
Tue Jan 04 14:48:56 [replslave] resync: done with initial clone for db: staging_KMI
Tue Jan 04 14:48:57 [replslave] repl: applied 1 operations
Tue Jan 04 14:48:57 [replslave] repl: end sync_pullOpLog syncedTo: Jan 04 14:48:57 4d233359:1
Tue Jan 04 14:48:57 [replslave] repl: from host:localhost
Tue Jan 04 14:48:57 [replslave] An earlier initial clone of 'staging_KMI' did not complete, now resyncing.
Tue Jan 04 14:48:57 [replslave] resync: dropping database staging_KMI
Tue Jan 04 14:48:57 [replslave] resync: cloning database staging_KMI to get an initial copy
Tue Jan 04 14:48:57 [replslave] resync: done with initial clone for db: staging_KMI