> Did you upgrade the warnings plugin lately?
Yes, always when a new update came out.
> What plugins (and versions) are you using?
JDK 1.6.0_02
Hudson 1.245
Tomcat 6.0.14
batch-task 1.3
build-timeout 1.4
checkstyle 1.9
ci-game 1.6
claim 1.0
cobertura 0.8.4
crap4j 0.4 (installed but not used at the moment)
deploy 1.3 (installed but not used at the moment)
description-setter 1.3 (installed but not used at the moment)
disk-usage 0.5
email-ext 2.1 (installed but not used at the moment)
emma 1.8 (installed but not used at the moment)
emotional-hudson 1.01
findbugs 2.11
gcal 0.2 (installed but not used at the moment)
ivy 0.1 (installed but not used at the moment)
jabber 0.5
locks-and-latches 0.2
plot 1.1 (installed but not used at the moment)
pmd 1.9
Subversion Tagging Plugin 1.4 (installed but not used at the moment)
tasks 2.11
text-finder 1.2
violations 0.7.0
warnings 1.7
webtestpresenter 0.22 (installed but not used at the moment)
Almost any CI-Game relevant plugin was updated after installation of the CI-Game.
I must correct this: The CI-Game doesn't work generally anymore.