I've been testing out Export to make sure it is idiot proof, and I have some problems to report: TIFF (and for the moment PNG too) can't handle INDEXED ALPHA, though they can handle either alone, they can't handle both at once. There's no way to reflect this in the Export API - either a way must be added, or there must be a workaround elsewhere... XBM will fail after export worked, because it inists on having precisely two colours. That's fair enough when you know what an XBM is, so I don't know if / how we should fix it. PAT doesn't seem to have been designed with alpha in mind. Is there a good reason to use alpha with PAT? Does Gimp even support it anywhere? Right now it Exports with CAN_HANDLE_ALPHA and the results are not good. Other than these, my tests all look great. There was no consensus about changes to the displayed availability of file formats, so I'm still thinking about that off-line. Nick.