ML Bot 3.13 has a new connection system with the server, less intensive and a bit more reliable. We are having problems with the Apache server right now, thus we disabled the Cardlog, Buddylog, and e-mails at the end of the trades.
ML Bot staff apologize for these problems, and ask you to not use the Online Control Panel intensively

MTGO Library Bot 3.12 features a better pricing system using PersonalPrices.txt. The final two fields (yes/no) have now been replaced by numbers. Those numbers are the needed quantities, respectively for regular and foil cards. You can now also use tabs and spaces to better format your file.

The Online Control Panel has two new logs: Card Log and Buddy Log. The former is used to track the history of a single card (for instance who bought that card, how much he/she paid, who sold that card and so on), the latter reports stats and log about a single customer (for instance how many trade he/she performed, how many withdraws, and so on)

Finally, the manual better explains the use of PersonalPrices and the use of the Administrator tab.