The citation style authoryear-comp is designed to output citations of the form '(Doe, 1992)'. (See p. 62 of the biblatex documentation.) This has worked as expected for me, even when using Biber as backend.
Recently, however, the behavior of authoryear-comp with biblatex does not match this. Instead of outputting citations of the form (Doe, 1992), it is simply printing the title and the year of the corresponding entry.
Here's a minimal example:
\documentclass{article}
\usepackage[style=authoryear-comp,backend=biber]{biblatex}
\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@article{Bli74,
author = {Blinder, Alan S.},
year = {1974},
title = {The economics of brushing teeth},
journaltitle = {Journal of Political Economy},
volume = {82},
number = {4},
pages = {887--891},
}
\end{filecontents}
\bibliography{\jobname}
\begin{document}
This paper is very good: \cite{Bli74}.
\printbibliography
\end{document}
And the generated pdf:

Again, if I don't call Biber, biblatex behaves as expected given the citation style.
I'm using pdfTeX, Version 3.1415926-2.3-1.40.12 (TeX Live 2011), and biblatex v1.7. I get the same results using XeTeX, Version 3.1415926-2.3-0.9997.5 (TeX Live 2011).
Thoughts?
biblatex.cfgconfiguration file? Note: The citation looks as if theauthorfield had been cleared. – lockstep Mar 28 '12 at 22:19authorfield had been cleared, but I don't know why. The author appears in the bibliography, and it appears in the citation when I don't use Biber. – apc Mar 28 '12 at 22:34biblatex.cfgconfiguration file. – apc Mar 28 '12 at 22:37