Get different anchor points when apply different images to the same cc.Sprite

[zyfu0000]

Add a sprite with a png image

this.sprite = cc.Sprite.create("image/HelloWorld.png");
this.sprite.setPosition(cc.p(0, 0));
this.sprite.setAnchorPoint(cc.p(0, 0));
this.addChild(this.sprite, 0);

the image's left-bottom corner is exactly on the screen's left-bottom corner.

Then I change another png image, the image's right-top corner is on the screen's center point, that is to say, the anchor point doesn't change.

Any rules about image file's format? or, is it a bug?

[dingpinglv]

Hi, zyfu0000

What does the "change another png image" mean?

Could you please give some codes to reproduces the question?