[Plugin: Simple Galleria for WordPress] Fatal Error when having multiple galleries on one (web) page

When I add one gallery each to multiple posts, they work perfectly when I look at the posts individually.

When I look at my index page, i.e. when I have multiple galleries on one web page because I can see multiple posts at once, I get this error in the galleries:

Fatal error: Could not extract a stage height from the CSS. Traced height: 0px

after a while (not always right away).

I’ve googled and tried some solutions for similar problems other people had, like adding a fixed height to the “galleria-stage” CSS tag, changing my doctype, but nothing works.

Any suggestions?

http://wordpress.org/extend/plugins/simple-galleria-for-wordpress/