NPE in Global "spaces report"

stack trace:

java.lang.NullPointerException
at net.sf.hibernate.proxy.HibernateProxyHelper.getClass(HibernateProxyHelper.java:36)
at net.sf.hibernate.impl.AbstractQueryImpl.guessType(AbstractQueryImpl.java:390)
at net.sf.hibernate.impl.AbstractQueryImpl.setParameter(AbstractQueryImpl.java:385)
at com.atlassian.confluence.core.persistence.hibernate.HibernateObjectDao$4.doInHibernate(HibernateObjectDao.java:291)
at org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:147)
at org.springframework.orm.hibernate.HibernateTemplate.executeFind(HibernateTemplate.java:382)
at com.atlassian.confluence.core.persistence.hibernate.HibernateObjectDao.findNamedQueryStringParams(HibernateObjectDao.java:283)
at com.atlassian.confluence.core.persistence.hibernate.HibernateObjectDao.findNamedQueryStringParams(HibernateObjectDao.java:268)
at com.atlassian.confluence.core.persistence.hibernate.HibernateObjectDao.findNamedQueryStringParams(HibernateObjectDao.java:248)
at com.atlassian.confluence.core.persistence.hibernate.HibernateObjectDao.findNamedQueryStringParam(HibernateObjectDao.java:233)
at com.atlassian.confluence.spaces.persistence.dao.hibernate.HibernateSpaceDao.getSpacesCreatedOrUpdatedSinceDate(HibernateSpaceDao.java:78)
at com.atlassian.confluence.spaces.DefaultSpaceManager.getSpacesCreatedOrUpdatedSinceDate(DefaultSpaceManager.java:104)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.springframework.aop.framework.AopProxyUtils.invokeJoinpointUsingReflection(AopProxyUtils.java:59)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:201)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:176)
at com.atlassian.confluence.util.profiling.SpringProfilingInterceptor.invoke(SpringProfilingInterceptor.java:17)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:196)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:135)
at $Proxy15.getSpacesCreatedOrUpdatedSinceDate(Unknown Source)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)