See the attached two screenshots, which show how to take care of the folder thumbnail captions and the image thumbnail captions. The code that you need to use between the <h3> or <h6> tags is this, and the syntax is very important:
<%=label.replaceAll("_", " ");%>
You might want to copy and paste it, rather than trying to enter it by hand.
(Laza - Offering to replace underscores with spaces might be a nice skin option.)
Hmmm... Some of the folders are OK, but others are not. In particular, the Sverige folder is not working. I think Laza will need to look at this one.
Is it OK if I post a link to the album?
Yes, folder.svg is present in the album's res folder, and on the server. The path to it on the Sverige album page is incorrect. It's pointing one level too high, at Bussmicke's jalbum.net account root, rather than to the top level of the album. Not sure why.... that's one for Laza!