Replace this photo
The Flickr site has the function "Replace this photo", which allows you to update a photo without destroying the meta-data or links to the photo. It is useful when you detected some error and want to fix it, for example.
FlickStackr users are likely to detect errors when in FlickStackr and may even be able to fix them using an iPad application. You see a dust spec, for example, and use Touch Retouch to remove it. At that point it would be interesting if the modified photo could be replaced in FlickStackr. Otherwise you have to upload it, go to a desktop, download it, replace it on the Flickr site and delete the uploaded photo from Flickr. You could also go via iTunes of course, but it still is tedious or impossible if you're on the go.
This is now available in version 3.3
We have started working on this for the next update.
This is something possible. We will update this request once we know when we could start working on it.
Werner Donné commented
Thank you very much!