November 1st, 2012· This version corrects an electron mass error.
July 2nd, 2012· This version supports conversion to sums of units (e.g., feet and inches or hours and minutes). It includes a script to automatically update the currency conversion rates.
· The units are now in Unicode with UTF-8. Units can be defined with reference to environment variables, so you can now select local units such as the gallon without changing locale, and these units will work everywhere.
· The name of the units database has changed, and the syntax for defining nonlinear units has changed slightly to allow specification of domain and range.
· The personal units database is now $HOME/.units.