Orbeon throws StackOverFlowError when trying to access database - orbeon

Question

I have Orbeon 3.9 PE-version running on Tomcat 6.0, installed on Debian 6.0.2 with MySQL 5.1.
I can get the Orbeon running and access/use applications deployed in the resources/apps but accessing the form builder new-form-creation (../orbeon/fr/orbeon/builder/new) causes the following error to be printed into log (and the page does not load, preventing from creating forms):
2011-10-04 14:11:09,274 INFO OrbeonSessionListener - Session Listener - Session created.
2011-10-04 14:11:10,631 WARN XFormsServer - xxforms:instance() - instance not found {instance id: "fr-uuid"}
2011-10-04 14:11:10,631 WARN XFormsServer - xxforms:instance() - instance not found {instance id: "fr-save-locally-file-name"}
2011-10-04 14:11:11,838 WARN XFormsServer - xxforms:instance() - instance not found {instance id: "fr-uuid"}
2011-10-04 14:11:11,838 WARN XFormsServer - xxforms:instance() - instance not found {instance id: "fr-save-locally-file-name"}
2011-10-04 14:12:00,649 ERROR ProcessorService - Exception with no location data
java.lang.StackOverflowError
at java.lang.Exception.<init>(Exception.java:41)
at java.lang.RuntimeException.<init>(RuntimeException.java:43)
at org.orbeon.oxf.common.OXFException.<init>(OXFException.java:203)
at org.orbeon.oxf.common.ValidationException.<init>(ValidationException.java:105)
at org.orbeon.oxf.xforms.xbl.XBLContainer.performDefaultAction(XBLContainer.java:809)
at org.orbeon.oxf.xforms.XFormsContainingDocument.performDefaultAction(XFormsContainingDocument.java:1004)
at org.orbeon.oxf.xforms.xbl.XBLContainer.dispatchEvent(XBLContainer.java:1035)
at org.orbeon.oxf.xforms.XFormsContainingDocument.dispatchEvent(XFormsContainingDocument.java:880)
at org.orbeon.oxf.xforms.XFormsContextStack.pushBinding(XFormsContextStack.java:562)
at org.orbeon.oxf.xforms.XFormsContextStack.pushBinding(XFormsContextStack.java:247)
at org.orbeon.oxf.xforms.ControlTree$CreateControlsListener.pushBinding(ControlTree.java:824)
.....
My context file 'orbeon.xml':
<Context path="/orbeon" docBase="/usr/local/orbeon-3.9" debug="0" reloadable="true">
<Resource name="jdbc/orbeonmysql" auth="Container" type="javax.sql.DataSource" initialSize="3" maxActive="10" maxIdle="20" maxWait="30000" driverClassName="com.mysql.jdbc.Driver" poolPreparedStatements="true" username="orbeon" password="xxx" url="jdbc:mysql://localhost:3306/orbeon?useUnicode=true&characterEncoding=UTF8"/>
</Context>
The database config in properties-local.xml:
<property as="xs:anyURI" name="oxf.fr.persistence.service.mysql.datasource" value="orbeonmysql"/>
<property as="xs:anyURI" name="oxf.fr.persistence.app.uri.*.*.*" value="/fr/service/mysql"/>
I have installed the same Orbeon PE package on windows 7 with tomcat6 and mysql 5.1 with the same settings and it works just fine.
On the Debian server I have Confluence installed on the same tomcat, connecting to the same database server, which also works just fine.
I have tried with 2 versions of MySQL Connectors:
mysql-connector-java-5.0.8
mysql-connector-java-5.1.17
I'm lost here as the error log tells me nothing that I could work with, nor am I able to find any similar issues to get clues from.
// UPDATE
Tried both the -Xss16m and -Xss32m. The page will not give the StackOverFlowError anymore, but will never stop loading either.
I also removed the Confluence instance from the Tomcat to be sure it is not part of the problem.
I inserted a database dump and noticed that the builder/summary page will display the forms in the db.
I can access the summary pages of published forms. Also it is possible to fill in new data with the published forms or edit existing.
The only thing not working are the builder edit/new pages.
I also tried adding 'ulimit -s 2048' to tomcat startup, no effect.
The tomcat JAVA_OPTS in tomcat config are as follows:
ulimit -s 2048
export JAVA_OPTS="-Djava.awt.headless=true -Xmx1024M -Xms256m -XX:PermSize=256m -XX:MaxPermSize=1024m -XX:+HeapDumpOnOutOfMemoryError -Xss32m"
export CATALINA_OPTS="$CATALINA_OPTS $JAVA_OPTS"
The last log entries printed are:
2011-10-06 08:41:09,051 WARN XFormsServer - xxforms:instance() - instance not found {instance id: "fr-uuid"}
2011-10-06 08:41:09,051 WARN XFormsServer - xxforms:instance() - instance not found {instance id: "fr-save-locally-file-name"}
2011-10-06 08:41:10,289 WARN XFormsServer - xxforms:instance() - instance not found {instance id: "fr-uuid"}
2011-10-06 08:41:10,289 WARN XFormsServer - xxforms:instance() - instance not found {instance id: "fr-save-locally-file-name"}
// END OF LOG, no new rows after 10mins of waiting