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Office Communicator 2007 crashes when a new USB storage device is attached in a Citrix environment. Citrix has a program in which any new device that is added locally to the computer is added to the Citrix session.
To resolve this issue, install the update for Communicator 2007 that is dated March 2009. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
961552 Description of the update for Communicator 2007: March 2009
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.