Hi, I 'm not sure if your plugins breaks Organize Series plugin or it is bad coding in Organize Series http://wordpress.org/extend/plugins/organize-series/
I use wp 3.3.2 multisite and had the Organize Series and Organize Series Publisher plugins enabled and some posts as parts of a Serie.
I activated your plugina and set a post as post in other language. So soon as I hit the "update" button on the "Edit post" page, the post lost it's settings as part of a Serie.
Any ideas ?
Thanks in advance