[Proj] puzzled with +towgs84=... being ignored

[Hermann Peifer]

On 2014-01-10 12:58, J. Luis wrote:
> OK, thanks though before this I would be ready to swear that I had used
> in past only by specifying the +towgs84 in one side only (and get the
> correct conversion)
>

The default datum application behavior changed with the 4.6.0 release.., 
  see the FAQ at 
http://trac.osgeo.org/proj/wiki/FAQ#WhydoIgetdifferentresultswith4.5.0and4.6.0

Hermann