Can't create blank pages on c.a.com

Exception in the logs is:

2005-10-19 07:47:45,635 ERROR [opensymphony.webwork.dispatcher.ServletDispatcher] Could not execute
action
java.lang.NullPointerException
at com.atlassian.renderer.wysiwyg.DefaultWysiwygConverter.convertChildren(DefaultWysiwygConv
erter.java:187)
at com.atlassian.renderer.wysiwyg.DefaultWysiwygConverter.convertXHtmlToWikiMarkup(DefaultWy
siwygConverter.java:702)
at com.atlassian.confluence.pages.wysiwyg.DefaultConfluenceWysiwygConverter.convertXHtmlToWi
kiMarkup(DefaultConfluenceWysiwygConverter.java:51)
at sun.reflect.GeneratedMethodAccessor1140.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at org.springframework.aop.framework.AopProxyUtils.invokeJoinpointUsingReflection(AopProxyUt
ils.java:61)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMe
thodInvocation.java:149)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvo
cation.java:116)
at com.atlassian.confluence.util.profiling.SpringProfilingInterceptor.invoke(SpringProfiling
Interceptor.java:16)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvo
cation.java:138)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInte
rceptor.java:56)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvo
cation.java:138)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:152)
at $Proxy27.convertXHtmlToWikiMarkup(Unknown Source)
at com.atlassian.confluence.pages.actions.AbstractCreateAndEditPageAction.validate(AbstractC
reateAndEditPageAction.java:81)