When "large" is specified as the value to the "size" parameter with trailing white spaces, the create space macro will fail to recognize it. The effect of this is that the macro will generate an image link using the 16x16 image instead.

To reproduce the problem try using the following wiki markup:

{create-space-button: size=large | width=32 | height=32}

The 16x16 image is rendered in this case. However, when the following markup is used:

{create-space-button: size=large| width=32 | height=32}

The 32x32 image is rendered instead.