I have tried to use the following plugin on a WPMU installation because most of the plugins work actually quite good on WPMU.
It's the following plugin: Eshop http://www.quirm.net/page.php?id=39
So far I get an error when I activate the plugin and every site on the MU install gives a 500 error on every page after that.
The error that I get in my php logs is:
PHP Fatal error: Call to undefined function wp_get_current_user() in /var/www/html/wp-includes/capabilities.php on line 446
I have searched and seen more issues with exact the same error, but it should not be soemthing with the working of this plugin I have the idea.
What could be wrong ?