Not working on Arduino Pro Mini 3.3v ATMega 328

```
The library is imported into project - no problem.  The call to the delay 
method executes without error but I see no evidence that the thing is going to 
sleep.  I have monitored its current draw at ~17 mA and noted that it does not 
drop at all.  Any ideas would be greatly appreciated.
```

Original issue reported on code.google.com by `donblayl...@gmail.com` on 31 Jul 2013 at 1:33
