FIX: In Reporting Services together with SQL Server 2005 Service Pack 2, the "Save As Report" dialog box stops responding, or the "Open Report" dialog box stops responding in Report Builder
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Source: Knowledge Base
Product: Microsoft SQL Server 2005 Reporting Services
Notification Contents: New, All Modifications and Delete
FIX: In Reporting Services together with SQL Server 2005 Service Pack 2, the "Save As Report" dialog box stops responding, or the "Open Report" dialog box stops responding in Report Builder
http://support.microsoft.com/kb/942715/en-US