We just upgraded all our mongodb instances to 2.0.2

Mongodb runs as :

/usr/bin/mongod --journal -f /etc/mongod.conf --rest --syncdelay 20 --profile=1 --slowms=200

It doesn't seem to create the system.profile collection when the profile level is set to 1.

The temp fix is to up the profiling level to 2, and then set it back to 1.