Reply To: What Plug-ins are these?

I had someone else work on a CS4 file, and when it came back I now also get the missing plugin error message.

mm.ms.im.Kernel.InDesignPlugin

Every time I save that document I have to name the file – it's like it was converted from an older version or something. I did a Save As, but that didn't fix it. My other files work fine. It's just this one file.

Any idea how to get rid of this? It's a 28-page newsletter . . . I suppose I could try drag-copying the pages. Anybody figured this one out?