Created attachment 104312 [details] tiff file with multiple layers and some pattern and gradient fills Just take a look @ attached file.
I guess you made this tiff in Photoshop? Photoshop uses a different, non-standard way of encoding layers. There's an existing wish for supporting that, but nobody has stepped up to implement it yet: 338470. *** This bug has been marked as a duplicate of bug 338470 ***