Tab characters in JSON strings

ERROR [http-8090-4] [[Standalone].[localhost].[/].[servlet-module-container-servlet]] log Servlet.service() for servlet servlet-module-container-servlet threw exception
java.lang.RuntimeException: org.codehaus.jackson.JsonParseException: Illegal unquoted character ((CTRL-CHAR, code 9)): has to be escaped using backslash to be included in string value
 at [Source: java.io.StringReader@75224d47; line: 1, column: 16839]
	at com.atlassian.mywork.host.dao.ao.AORegistrationDao.get(AORegistrationDao.java:47)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.atlassian.activeobjects.tx.TransactionalProxy.invoke(TransactionalProxy.java:79)
	at com.atlassian.activeobjects.tx.TransactionalProxy.access$000(TransactionalProxy.java:18)
	at com.atlassian.activeobjects.tx.TransactionalProxy$1.doInTransaction(TransactionalProxy.java:63)
	at com.atlassian.sal.core.transaction.HostContextTransactionTemplate$1.doInTransaction(HostContextTransactionTemplate.java:25)
	at com.atlassian.sal.spring.component.SpringHostContextAccessor$1.doInTransaction(SpringHostContextAccessor.java:88)
	at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:128)
	at com.atlassian.sal.spring.component.SpringHostContextAccessor.doInTransaction(SpringHostContextAccessor.java:82)
	at sun.reflect.GeneratedMethodAccessor89.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at