The "Parsing arguments and building values" section of the Python/C API Reference Manual describes the "s#" format unit as requiring a [const char *, int].  This should presumably be a Py_ssize_t, as that's what the code appears to expect.

The same problem also occurs elsewhere in this page; pretty much everywhere the # format modifier is described.

I'm seeing this in both the 2.5.1 and development versions of the docs on docs.python.org.