Currently, in Conversation History messages, file transfers appear exactly as they do in the original message window, including the Accept, Decline links. It would be much more informative and less confusing if these links were removed in message history and replaced with a blockquote that stated the end result:
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"You received file c:\xyz.doc (500KB). Total transfer time was 10 seconds (100 KB/sec)."
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or
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"You declined the transfer of xyz.doc (500KB)."
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or
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"A transfer of xyz.doc was attempted, but it failed. A connection to User A could not be established."
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Just a thought.