Admin menu collapses constantly

After installing the latest “User role editor” i changed the settings for the “editor” role. When logging in as “editor” I now can’t pin the admin menu to be expanded. It collapses every time I click on a new menu. Even if I click on some of the sub menus. It’s very annoying.

I’ve uninstalled it but that didn’t make any difference.

I’ve cleared my cache and cookies but that didn’t make any difference.

Could “User Role Editor” or one the role settings create this behaviour or should I look into something else? I’m pretty sure I haven’t played with anything else while testing this.

http://wordpress.org/extend/plugins/user-role-editor/