On Python 2.6.5:
```
omero@gretzky:~/OMERO-CURRENT$ PYTHONPATH=lib/python python -c "from path import path; from omero.rtypes import rstring; print rstring(path('.'))"
object #0 (::omero::RString)
{
    _val = .
}
```

I wonder if this is a py27 issue? Do you have "path.py" installed locally?

```
omero@gretzky:~/OMERO-CURRENT$ PYTHONPATH=lib/python python -c "import path; print path.__file__"
/home/omero/slave/workspace/OMERO-merge-develop/src/dist/lib/python/path.pyc
```