I strongly recommend that people use my last version that was linked to by @chaban. It has full caching support and sends more metadata. I’m positively certain that no windows/fb2k update will break it. Only changes to the LB server API will do that.
@outsidecontext, you should update your readme because it’s misleading. It has no support at all for caching/retrying of failed submissions. Also, you should update the tag list to accurately reflect what is sent.