Example below... To re-create open a mongo shell and start to type a database name i.e "use mydatabase" and press backspace or delete to remove a character and it goes crazy! - it's not just when you type "use [database]" it happens on all delete/backspace entries while in the shell.
I have tested this on 3 different servers (all with the same operating system but with varying CPU's / RAM) and it's the same on all.
This didn't happen prior to the update
Update was done with Apt
MongoDB shell version: 2.0.0
connecting to: test
> use mydatab> use mydata > use mydat