Versions with a trailing odd number are considered to be "in-development", these are unstable "bleeding-edge" versions of the compiler which you can get from Github. Versions with an even number are releases. E.g. 0.9.0 is a release version, 0.9.1 is an in-development version.
* Identifiers which only differ in case are bad style. If the programming language treats them the same the programmer needs to come up with different names for different things.
* Many programming languages are case insensitive: Lisp, Basic, Pascal, Ada, Eiffel, Fortran. Since software for aircrafts and power plants has been written in Ada, it seems reasonable to assume that case insensitivity will not destroy civilisation.
* Note that most people confuse case sensitivity with case consistency (which is indeed good style). However, case consistency is easier to achieve with case insensitivity and a properly configured IDE than with case sensitivity.
You can find examples in the [examples/](https://github.com/Araq/Nimrod/tree/master/examples) directory. There are also many other examples available on [Rosetta Code](http://rosettacode.org/wiki/Nimrod).