'Unknown Error' on Export or Word!

Question

Any attempt to export any document (even a blank one) to Word format fails with an "unknown error".
This is a new error that did not occur before, even with complex documents. I have rebooted, deleted the preferences file, etc. Does anyone else have this problem? Any thoughts on how to fix it?

Answer 1

I have been FIGHTING with the "Unknown export error" problem all day long, and I just figured out what the problem with my particular document was: it was because I had pasted an outline from Keynote into my document.
Here's a run-down of the other possible causes of this problem (all of which I tried and none of which worked): I tried deleting my preferences, activating and validating all my fonts, unclicking the "Include preview in document" box in the "Save as" menu. Because I was able to export a blank .pages document to Word, I went through my entire document, deleting bits of it until I was successfully able to export to Word.
I discovered that it was because I had pasted a little outline from a Keynote presentation and that the style (either paragraph or character, I'm not sure which) of the pasted bit confused Pages. Just highlight the [potential] problem area and choose "Normal" from the drop-down "Choose a character style" button, then for good measure choose "Normal" from the drop-down "Choose a paragraph style" button. Breathe a sigh of relief.