Thank you for your post.
I am able to replicate the issue using FileMaker Pro 12.0v1 on both Mac OS X 10.7.3 and Windows XP (SP3).
I have sent your post along with my findings to our Development and Testing departments for review. I will keep you updated as information becomes available to me. Until this is resolved, revisit your script steps with Go to Object and make the object case sensitive for the Swedish characters.