FIX: The Report Designer or the Report Manager stops responding when you try to export a SQL Server 2005 Reporting Services report to a PDF file or a TIFF file
The following pages were recently modified.
Source: Knowledge Base
Product: Microsoft SQL Server 2005 Reporting Services
Notification Contents: New, All Modifications and Delete
FIX: The Report Designer or the Report Manager stops responding when you try to export a SQL Server 2005 Reporting Services report to a PDF file or a TIFF file
http://support.microsoft.com/kb/937090/en-US