java.security.cert.CertificateExpiredException when running 'mvn hpi:run'

[Denis Kniazhev]

Hello,
I'm developing a plugin. Starting from today I'm getting this error when 
running 'mvn hpi:run':

SEVERE: <div class=error><img src='/static/a37a1841/images/none.gif' 
height=16 width=1>Signature verification failed in the update center 
&#039;default&#039; <a href='#' class='showDetails'>(show details)</a><pre 
style='display:none'>java.security.cert.CertPathValidatorException: 
timestamp check failed
        at 
sun.security.provider.certpath.PKIXMasterCertPathValidator.validate(PKIXMasterCertPathValidator.java:159)
 ...
Caused by: java.security.cert.CertificateExpiredException: NotAfter: Wed 
Apr 18 10:35:04 EEST 2012

How do I cleanup/workaround this expired certificate?

Thanks,
Denis