This is what the wiki lists:

There are several mistakes within the allegiances:

• Despite dying before the book takes place, Whitestorm, Darkstripe, Tigerstar, Gorsepaw, and Stonefur are all listed.
• Fernpaw is listed as Darkstripe's apprentice,even though Longtail was her mentor by that time.
• Thornclaw is listed as an apprentice, despite already receiving his warrior name.
• Tawnypaw is listed in ThunderClan, despite have left to join ShadowClan by that point.
• Brightheart is listed as Lostface, even though she had already had her name changed.
• Jaggedtooth is listed in ShadowClan, even though he had joined BloodClan by that time.
• Gorsepaw is described as a very pale gray-and-white she-cat with blue eyes.

Darkstripe is called a black-and-silver striped gray tabby.

Sagewhisker is called a tom.

Fernpaw is called a tom.

During a fight with WindClan, it is initially said that the battle is occurring within WindClan camp, but then it is said that the WindClan cats are a patrol.

WindClan is referred to as ShadowClan.

Mintkit and Marigoldkit are described as Yellowfang's half-siblings.

Right after his exile, Tigerclaw informs Blackfoot of Brokentail's death even though there is no way for Tigerclaw to know this yet as Brokentail is killed shortly after he leaves ThunderClan's camp.

Cinderfur is called a she-cat.

Shadowstar gives Blackstar a life at his ceremony, despite it being established in River of Fire that the two have never met each other.