Some readers may remember my endorsement of the Firefox plug-in Zotero as one of the best open source options for reference management. You will be pleased to know that a nice little upgrade - from 1.0.3 from 1.0.2 - is now available. It includes some added functional support for downloading references from some major sites, such as PubMed, updated output styles, and some handy fixes for a few bugs in word processor integration. Zotero 1.0.3 is a must-have release for anyone who uses this program (and is worth a look for those who don't use it yet!).