This bug fix release, less than a month after the initial release of 5.3, addresses a few minor concerns; details are in the release notes. It is a drop-in replacement for 5.3, and is a recommended upgrade for all users.
Tapestry is primarily available for download via Maven, from the Maven central repository:
<dependency> <groupId>org.apache.tapestry</groupId> <artifactId>tapestry-core</artifactId> <version>5.3.1</version> </dependency>
You can also download the source or JavaDocs archives.