In one dynamic album I see in photo's detail view before the album's name this error message:

Warning: in_array() [function.in-array]: Wrong datatype for second argument in /home/path/to/mysite.ee/public_html/site/zp-core/template-functions.php on line 1029

What does it mean exactly? Where should I look for error and what can I do against?

Maybe a few more infos and a link maybe?

Thanks, here:
http://foto.nurmoja.net.ee/Jaanus_Nurmoja/Elektrikatkestus.alb/

Please try the nightly build and tell us if the problem is resolved.

Yes, resolved.