FIX: An access violation may occur when you run a query that uses a hash join hint in the x64 version of SQL Server 2005 Service Pack 2
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Source: Knowledge Base
Product: Microsoft SQL Server 2005 Enterprise X64 Edition, SQL Server 2005 Enterprise Edition & SQL Server 2005 Standard Edition
Notification Contents: New and All Modifications
FIX: An access violation may occur when you run a query that uses a hash join hint in the x64 version of SQL Server 2005 Service Pack 2
http://support.microsoft.com/kb/937521/en-US