QB Version 2.1.48, 2010-07-28

Current QB2 Queue contains many waiting configurations: 100+
I just want to remove them.

I started FireFox and opened QB2 Overview
I clicked: "Queue" and selected 25 checkboxes (waiting configs)
Then I always (reproduceable) get following:
 The session is inactive for a long time (30 mins by default) and is expired to reduce server memory usage.
Error Detail

WicketMessage: Cannot find the rendered page in session [pagemap=null,componentPath=1:tabs:panel:waitingBuilds:builds:form:dataTable:rows:34:cells:1:cell:rowSelector,versionNumber=1]

Root cause:

org.apache.wicket.protocol.http.PageExpiredException: Cannot find the rendered page in session [pagemap=null,componentPath=1:tabs:panel:waitingBuilds:builds:form:dataTable:rows:34:cells:1:cell:rowSelector,versionNumber=1]
at org.apache.wicket.protocol.http.WebRequestCycleProcessor.resolve(WebRequestCycleProcessor.java:197)
at org.apache.wicket.RequestCycle.step(RequestCycle.java:1310)
at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1428)
at org.apache.wicket.RequestCycle.request(RequestCycle.java:545)
at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:479)
at org.apache.wicket.protocol.http.WicketServlet.doPost(WicketServlet.java:160)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:616)
at com.pmease.quickbuild.web.WebServlet.service(WebServlet.java:62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at org.eclipse.equinox.http.servlet.internal.ServletRegistration.handleRequest(ServletRegistration.java:90)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:111)
at org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:59)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
at org.eclipse.equinox.http.jetty.internal.HttpServerManager$InternalHttpServiceServlet.service(HttpServerManager.java:318)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:502)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:380)
at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:535)
at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:880)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:748)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:219)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:228)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:520)