Error STRIPS-0003 raised incorrectly?

[marhop]

Validating the attached file (source) with DPFManager 3.5.1 using the default (Baseline TIFF 6.0) profile raises error STRIPS-0003 "Image width and image height do not match with strips sizes" in IFD1.

This image has the following properties:

• 512 columns, 320 rows
• bilevel (black/white), 1 bit per pixel
• no compression
• 3 strips with 8/8/4 KiB and 128/128/64 rows per strip

So there are 512/8 × 320 = 20480 bytes = 20 KiB, organized into 3 strips of 8 + 8 + 4 = 20 KiB. Further more, there are 320 rows, organized into 3 strips of 128 + 128 + 64 = 320 rows. Looks good to me.

What do you think? Am I missing an error in the file or is this a bug in DPFManager?

Thanks,
Martin