I contacted the developer. His answer is:
"Hi there,
I'm afraid it's so long since I designed and built the zenphoto theme that my knowledge about the theme is no longer relevant. Other developers have changed, improved, and expanded the default theme, so despite my name still being attached, I've had very little to do with it lately.
So unfortunately, I can't help you.
But I would recommend you ask your question in the zenphoto forums:
http://www.zenphoto.org/support/
Joen"

Okay. So, back at the beginning.
I tried to find all &raquo and stuff and replace it. Somehow I made a mistake. Now theres not shown &raquo but weiter>>
Could you please describe step-by-step what and where I have to replace? Or could you find somebody to update the Default Theme?

Thank you,
Hanna

What a pity. I love this theme. Its simple quick and clean. I've tried the others but always seem to come back to zpminimal. Thanks to the developer anyway for a fine job. Maybe someone will pick it up and carry on.

Regards

Deljones

@hannacharlotte: Note that this thread is about the theme named "zpminimal" and the developer is found on his website www.gir-web.com. He even has his own forum for support of his various themes (although he may be a bit short of time at times). zpminimal is not that old in fact....

If you contacted someone named joen you are talking about the "default" theme which is not thetheme this topic is about and an entirely different theme. Since it is one of the six officially supported theme it does not have this issue. As always if you customized a theme it you need to update it yourself.

I am not familar with zpminimal at all but the issue applies normally to breadcrumbs and pagelist navigations. Those should be easily found.

Hi Acrylian,
in fact I AM using the default theme. Thats why I contacted Joen.
I posted in this thread because I didnt want to open a new one and I do have the same problems as deljones (but I have them with Defauslt, he has them with Minimal. But same issues with the html showing, strange).
As I customized the theme a little I will have to have to go through all the files in the theme to search them out.
...

I fixed it (in a dummy way).
Seems that it didnt like the "" at all on the index.php. I deleted them. Now I only have the words "next" and "prev" to navigate, without the arrows. But I dont care.
Thank you*
Hanna

No problem, Joen is not part of the Zenphoto team for years (even wasn't when I joined actually). Anyway, what is included in the release is supported by us. My colleague posted above how to get the arrows (that are French quotes actually).

Hi Hanna...

Yes I did the same. You might want to look in album.php for the &raquo text.

Del