I'm sorry but I'm not sure to understand "If you are selecting files from a ditamap". Do you mean "when the href attribute of a topicref is selected in the Attributes tool and you click on the Browse button"? --This is correct.
And the only reason I am bothered by this feature is because I use the product very happily every day :) This e-mail message and all attachments transmitted with it may contain privileged and/or confidential information intended solely for the use of the addressee(s). If the reader of this message is not the intended recipient, you are hereby notified that any reading, dissemination, distribution, copying, forwarding or other use of this message or its attachments is strictly prohibited. If you have received this message in error, please notify the sender immediately and delete this message, all attachments and all copies and backups thereof.