The warnings plugin has has two bugs in its statistics part (see screenshot)
1) it gives a wrong number of issues, it adds the issues per package and the
number in the summary.

2) When drilling down in the summary path a wrong link is generated, e.g.
http://xyz.uvw.de:9090/hudson/job/name/198/warningsResult/package.-/file.-2032530446/source.492/#96

Configuration:
JDK 1.6.0_02
Tomcat 6.0.14
Ant 1.7.1
Hudson 1.45
Warnings 1.7