You shouldn't need to -- although you will need to end audio/video conversations before
starting another one with someone else (with the exception of MSN Messenger 6's 'Webcam'
feature). What happens when you don't?
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Jonathan Kay
Microsoft MVP - Windows Messenger/MSN Messenger
Associate Expert http://www.microsoft.com/windowsxp/expertzone/
Messenger Resources - http://messenger.jonathankay.com