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 This is already quite outdated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 ;)