Quoting David Potts <dave.potts@pinan.co.uk>:

> I notice from the postgis download page (http://www.postgis.com/download/)
> 
> # [2007/01/11] postgis-1.2.1.tar.gz
> # [2007/01/31] postgis-1.1.7.tar.gz
> # [2005/12/06] postgis-1.0.6.tar.gz
> # [2005/07/25] postgis-0.9.2.tar.gz
> 
> Which is the latest version  postgis-1.2.1.tar.gz or postgis-1.1.7.tar.gz
> 
> Does the version number or the date matter

The latest version of the 1.2 series is 1.2.1
The latest version of the 1.1 series is 1.1.7

The 1.2 series contains a few features that do not exist in the 1.1 series. They 
are both patched up for bug and PgSQL support to about the same level. 




