Exception while trying to update my profile settings with Crowd and read-only LDAP

java.lang.IllegalArgumentException: POSIX support is currently read-only
	at com.atlassian.crowd.integration.rest.service.RestCrowdClient.handleCommonExceptions(RestCrowdClient.java:1081)
	at com.atlassian.crowd.integration.rest.service.RestCrowdClient.updateUser(RestCrowdClient.java:128)
	at com.atlassian.crowd.directory.RemoteCrowdDirectory.updateUser(RemoteCrowdDirectory.java:139)
	at com.atlassian.crowd.directory.DbCachingRemoteDirectory.updateUser(DbCachingRemoteDirectory.java:191)
	at com.atlassian.crowd.manager.directory.DirectoryManagerGeneric.updateUser(DirectoryManagerGeneric.java:304)
	at com.atlassian.crowd.manager.application.ApplicationServiceGeneric.updateUser(ApplicationServiceGeneric.java:347)
	at com.atlassian.crowd.embedded.core.CrowdServiceImpl.updateUser(CrowdServiceImpl.java:264)
	at com.atlassian.crowd.embedded.atlassianuser.EmbeddedCrowdUserManager.saveUser(EmbeddedCrowdUserManager.java:190)
	at com.atlassian.user.impl.delegation.DelegatingUserManager.saveUser(DelegatingUserManager.java:210)
	at bucket.user.DefaultUserAccessor.saveUser(DefaultUserAccessor.java:232)
	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:597)
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:304)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:182)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:149)
	at com.atlassian.spring.interceptors.SpringProfilingInterceptor.invoke(SpringProfilingInterceptor.java:16)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:106)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
	at $Proxy36.saveUser(Unknown Source)
	at com.atlassian.confluence.user.actions.EditMyProfileAction.updateUser(EditMyProfileAction.java:171)
	at com.atlassian.confluence.user.actions.EditMyProfileAction.doEdit(EditMyProfileAction.java:86)
<snip>