I found a stitching error in one of my synths and want to update it with a fix.  How can I do this and keep the same URL?

I'm sorry, elfrench, but that isn't supported.

The new version will just have to be at a separate URL.

Is it on the feature list for the next update?

elfrench, I am not part of the Photosynth team, so I can't tell you when it is planned to be released, but the question has been asked before and Photosynth team members have commented on the topic before.

Here are some links to previous conversations. In conversations where a Photosynth team member has commented, I will list their username, so you can pay attention to what they've said. 

http://getsatisfaction.com/livelabs/topics/replacing_a_synth

http://getsatisfaction.com/livelabs/topics/replace_original_photo_with_a_retouched_modified_photo_without_altering_the_synth

http://getsatisfaction.com/livelabs/topics/community_friendly_synth_replacing
Photosynth: Kevin H

http://photosynth.net/discussion.aspx?cat=01b6f15f-42eb-49cb-a221-ed56615e1c47&dis=329391ca-44d1-4f6e-a03b-a398ee0ee55e
Photosynth: Marvin, Nathan, & Darius Monsef

http://photosynth.net/discussion.aspx?cat=ceca0f30-0f7c-4468-811a-32b623ea8563&dis=b5cd7b44-d1b4-4d38-87c1-511e1afbd763

http://photosynth.net/discussion.aspx?cat=6b63cb81-8b57-4d5d-a978-41d5509bf59a&dis=8c185c9e-2afc-4198-a266-c7a51677321c