StarTools

When I open any 32-bit (float) grayscale TIF (created either from DSS or Photoshop), I don't get any error but the image is all black (stays black with autodev, so really black). I have to convert them to 32-bit color to see them in ST.
Since there is no message about unsupported format, I assume this behavior is unintended.

OS X, Alpha 1.4.322

I assume this behavior is unintended.

It is indeed. Thank you for reporting this!

I think this is fixed in 1.4.324 now (tested a 32-bit FP TIF without problems on MacOSX). Do let me know!