Export Animation produces huge enlarged arm layer

[p8guitar]

I've got an animation with two image layers (one image of a person and one image of a lower arm) and some vector layers. The animation preview looks ok, but the rendered movie shows the lower arm so much enlarged that is bigger than the whole person.

Any ideas what might be the cause?
I'm afraid that the .png file of the lower arm is corrupted. I created it with GIMP. The size is only 164x332 pixels, the size of the project is 1440x1080 pixels. But maybe there is another reason?

[synthsin75]

Not enough info. Might have to see the file.

[Greenlaw]

Yes, we'll need more info to understand the problem.

Can you at least post screen caps of the workspace and of the weird render? They should both be the same frame of course.