Incompatibility between dynamic tasklist entries created on JDK 1.4 and JDK 5

How to reproduce:

1. Start confluence with JDK1.4.2, create a dynamictasklist and add a task
2. Stop confluence, switch to JDK5, restart confluence and access the page with the macro

The following appears in the page:

Cause:
com.thoughtworks.xstream.converters.ConversionException: Cannot construct java.util.Collections$SynchronizedRandomAccessList: java.util.Collections$SynchronizedRandomAccessList ---- Debugging information ---- required-type : java.util.Collections$SynchronizedRandomAccessList cause-message : Cannot construct java.util.Collections$SynchronizedRandomAccessList: java.util.Collections$SynchronizedRandomAccessList class : com.atlassian.confluence.extra.dynamictasklist.model.TaskList message : Cannot construct java.util.Collections$SynchronizedRandomAccessList: java.util.Collections$SynchronizedRandomAccessList line number : 3 path : /com.atlassian.confluence.extra.dynamictasklist.model.TaskList/tasks cause-exception : com.thoughtworks.xstream.converters.reflection.ObjectAccessException -------------------------------

com.thoughtworks.xstream.converters.ConversionException: Cannot construct java.util.Collections$SynchronizedRandomAccessList: java.util.Collections$SynchronizedRandomAccessList
---- Debugging information ----
required-type : java.util.Collections$SynchronizedRandomAccessList
cause-message : Cannot construct java.util.Collections$SynchronizedRandomAccessList: java.util.Collections$SynchronizedRandomAccessList
class : com.atlassian.confluence.extra.dynamictasklist.model.TaskList
message : Cannot construct java.util.Collections$SynchronizedRandomAccessList: java.util.Collections$SynchronizedRandomAccessList
line number : 3
path : /com.atlassian.confluence.extra.dynamictasklist.model.TaskList/tasks
cause-exception : com.thoughtworks.xstream.converters.reflection.ObjectAccessException

The bug is reported here http://jira.codehaus.org/browse/XSTR-202

Could you please implement the alias suggested by Joe Walnes's comment?

Note that this is a blocking for anyone willing to switch to JDK5 ; Hopefully, we switched very soon so we lost only one task list.