This happened to me, too. I use Jdownloader with multiupload well for long time. I didn't update my system (Win 7 32bi), including Java or Jdownloader. I didn't restart my computer. But today, I suddenly note that there is decrypter out of date error for multiuploader.

Example link: **External links are only visible to Support Staff****External links are only visible to Support Staff**

Log:
90 2010/11/11 下午 01:00:57 - SEVERE [java_downloader] -> Decrypter out of date: jd.plugins.decrypter.MltpldCm@cead6
90 2010/11/11 下午 01:00:57 - SEVERE [java_downloader] -> Decrypter out of date: 12001