> Do you use natbib, or some special bibliography stuff?
No. And I have tried changing bib styles, makes no difference.
Also, I should mention, I actually get 5 errors. The one I quoted in my
initial message is only the first. Then I get another error
Missing number, treated as zero.
...s~\cite{Kosaka1998,Kosaka1999b,Baba2002b}.
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
and another
Missing \endcsname inserted.
...s~\cite{Kosaka1998,Kosaka1999b,Baba2002b}.
The control sequence marked <to be read again> should
not appear between \csname and \endcsname.
And a couple more like this last one.
And for Andr�, my bib file contains no underscores at all.
Oh, and I am using lyx 1.3.3.
Alex.