Raring repo has an updated version (3.6.4-0ubuntu6) that might have changed the function get_rgba() to be more correct.
( Requiring two arguments upto atleast version 3.6.0-0ubuntu3.2 was a "bug", and we had to play along. )
For those on quantal experiencing this bug, it is because you enabled a third-party PPA that upgraded the package.
Last I checked, quantal-updates still has 3.6.0-0ubuntu3.2.
Raring repo has an updated version (3.6.4-0ubuntu6) that might have changed the function get_rgba() to be more correct.
( Requiring two arguments upto atleast version 3.6.0-0ubuntu3.2 was a "bug", and we had to play along. )
For those on quantal experiencing this bug, it is because you enabled a third-party PPA that upgraded the package.
Last I checked, quantal-updates still has 3.6.0-0ubuntu3.2.