Hi Marc,
Just to clarify, I don't disbelieve that you had a crash. What I meant was that TG2 shouldn't crash because it's loading a variant it doesn't support directly. Not "doesn't crash" but "shouldn't crash" :-). As a general principle TG2 shouldn't crash, which is what we aim for, but it really shouldn't crash in this particular situation. It should just let you know it can't load the image, as you've found with some of the bit depths it doesn't support.
Did you send a problematic TIFF file to the support address? If you didn't, could you please send me one personally at:
jomeder@planetside.co.uk
It probably doesn't need to be too big, just in the format you were have trouble with.
Regards,
Jo