JasperReports is updated quite frequently but the the JasperReports
Integration toolkit is shipped with a specific version, originally
3.7.4. This is already quite outdated although the Integration toolkit
didn't change it would still work against the latest JasperReports
libraries. I have started to separate the libraries for the
JasperReportsIntegration from the original JasperReports libraries, so
now you can upgrade your installation by simply replacing the old
libraries with the new ones.
Further questions will be added here as soon as they come up ;)