Problem viewing azw3 book

Hi.

I've been having a weird problem viewing this ebook with the built-in calibre reader. This is the result

http://imgur.com/6mCQpN6

while it works flawlessy on the kindle reader

http://imgur.com/g4J5hUG

is there anyway I can fix this? Even going fullscreen mode doesnt help it. I've been trying to convert it to EPUB but it is stuck on 47% since hours, so I guess something is messed up in the original formating and I'd rather fix it manually.

Thank you.