I have had stable 1.0.1 release before, but decided to upgrade to latest beta.
I don't need these "connection accepted" messages in production, so --quiet parameter worked for me well before.
But not in latest release, which obviously utilizes a lot of unneeded i/o.

Trying to start something like this:
/sbin/startproc $MONGODB_BIN --dbpath /usr/local/mongodb/data --quiet --logpath /var/log/mongodb.log --logappend --nohttpinterface