reproducable System error during Export Page as PDF

Just discovered a reproducable Confluence Bug.

To reproduce:
1. Open Browser
2. Paste http://confluence.atlassian.com/pages/viewpage.action?pageId=120723
3. Click on "Export Page as PDF"

Results - check below:
--------------------------------------------------------

Cause:
The user is null. Please specify a valid user.

Stack Trace: [hide]

The user is null. Please specify a valid user.
Referer URL: http://confluence.atlassian.com/pages/viewpage.action?pageId=120723

Build Information:
Confluence Home: /opt/java/src/confluence/deployments/conf.atlassian.com/home
Uptime: 12 hours, 56 minutes, 59 seconds
Version: 2.0-dev
Build Number: 319

Server Information:
Application Server: Orion/2.0.2
Servlet Version: 2.2
Database Dialect: net.sf.hibernate.dialect.PostgreSQLDialect

Memory Information:
Total Memory: 361 MB
Free Memory: 30 MB
Used Memory: 331 MB

System Information:
System Date: Tuesday, 15 Nov 2005
System Time: 06:15:23
System Favourite Colour: Lime
Java Version: 1.4.2_04
Java Vendor: Sun Microsystems Inc.
JVM Version: 1.0
JVM Vendor: Sun Microsystems Inc.
JVM Implementation Version: 1.4.2_04-b05
Java Runtime: Java(TM) 2 Runtime Environment, Standard Edition
Java VM: Java HotSpot(TM) Server VM
User Name: j2ee
User Timezone: America/Chicago
Operating System: Linux 2.4.21-37.ELsmp
OS Architecture: i386

Request
Information:
URL: http://atlassian01.contegix.com:10082/500page.jsp

• Scheme: http
• Server: atlassian01.contegix.com
• Port: 10082
• URI: /500page.jsp
• - Context Path:
• - Servlet Path: /500page.jsp
• - Path Info: null
• - Query String: pageId=120723&type=TYPE_PDF

Attributes:

• javax.servlet.error.exception : java.lang.IllegalArgumentException: The user is null. Please specify a valid user.
• javax.servlet.error.message : The user is null. Please specify a valid user.
• os_securityfilter_already_filtered : true
• com.atlassian.johnson.filters.JohnsonFilter_already_filtered : true
• javax.servlet.error.request_uri : /pages/doexportpage.action
• javax.servlet.error.status_code : 500
• os_authstatus : null
• _sitemesh_filterapplied : true
• javax.servlet.error.servlet_name : action
• webwork.valueStack : com.opensymphony.xwork.util.OgnlValueStack@1106bc3
• loginfilter.already.filtered : true
• atlassian.core.seraph.original.url : /pages/doexportpage.action?pageId=120723&type=TYPE_PDF
• javax.servlet.jsp.jspException : java.lang.IllegalArgumentException: The user is null. Please specify a valid user.
• sessioninview.FILTERED : true
• com.atlassian.core.filters.gzip.GzipFilter_already_filtered : true

Parameters:

• type = TYPE_PDF
• pageId = 120723