Book cover art inaccuracy

['thul]

These beings wonder whether other beings here have noticed the tendency in the cover art for fantasy books to reek of inconsistency and show obvious signs of the artist not even having attempted to read the book...

'thul find that many book covers are rather nice in their vast collection of inconsistencies...

Some examples, but beware of spoilers:
[spoiler=Elenium/Tamuli series by david & leigh edddings:]

• The hero is according to the book itself, a knight, dressed in full plate armor (made from steel), with dark hair. On the cover of one of the books, it showed a blond human, dressed in a golden loincloth (and therefore bare-chested).

[/spoiler]

Book 7-8ish of the Deverry cycle by katherine kerr

• One of the heroes, also dark-haired, usually using medieval style chain mail armor, is riding on a dragon, seated in a jeweled leather saddle, wielding no weapons due to the turbulence of the dragon's wings, dragons cannot breathe flames, as that would (literally) burn their throats. On the book cover, the character has bright golden-blond hair, wears a loincloth-like thingy made from what appears to be solid gold, has a golden cape, and wields a spear. The dragon is equipped with a saddle that also appears to be made from solid gold, and it is spitting fire.

These beings have noticed a general tendency elsewhere that while characters in books are relatively sensibly dressed, they are on the covers quite often dressed rather senselessly... Males are generally dressed in some form or loincloth, often with some unnaturally large jewel embedded in it, while female characters have the classical chain mail bikini, or something related to that, with a practical protection of about zero... Physical details like height are often also ignored, from what 'thul can see...

Have any one else noticed the same (or similar) tendencies in the book they read/have read?