SaveTileLayer()

Hi,
Ive postet a bug regarding the saveTileLayer() function here : http://www.garagegames.com/mg/forums/result.thread.php?qt=70900
but Im not sure if its a bug...

The problem is, that TileLayers wont save when I give a relative Path. Maybe someone knows what the problem might be? (if its not a bug)
I get : 2dTileMap::SaveTileLayer() - could not open File 'game/.../layer.lyr' for Tile Layer save.
(where 'game/.../layer.lyr' is some relative path).
It does work with a full path (which I think should no longer work according to the File IO doc)

thanks in advance