I've just listened to the lossless Play Pig (Pig & Dan Mix 2) from the store when I noticed some typical MPEG artifacts... The pre-echo artifacts at 0:03 are quite obvious. I'd certainly expect to hear them on the MP3 version but not on the lossless one. It's the same on the promo CDs. Some of the remixes are affected, but the UW tracks seem fine.
I thought I'd check the spectrum of the tracks to confirm my suspicion (some examples):
Play Pig (Pig & Dan Mix 3)
JAL To Tokyo (Paul Woolford Dub)
That looks like some MPEG compression to me. Maybe the iTunes MP3 encoder.
It surprises me that those files are supposed to be the lossless masters. Has there been an encoding error or are these really the best versions available? Have these 'lossy' masters also been used for the vinyl version?
Furthermore the 300x300 pixel artworks seem a little too small for PC viewing. I rather expected something like 300 dots
per inch than 300 dots for the whole cover. Some words are barely decipherable.