I'm having some problems with this (http://www.ebay.com.au/itm/FT232RL-FTDI-USB-to-TTL-Serial-Adapter-Module-for-Arduino-Mini-3-3V-5-5V-FTDI232-/231261980255?pt=LH_DefaultDomain_15&hash=item35d849c65f&_uhb=1) ftdi adapter and a Pro Mini.
This is the error i get when i try and upload a program.
In my research i have discovered this seems to be a driver problem or something to do with the ftdi board not talking properly with the computer. I'm running OS X 10.9.