I just made several changes to an SVG file:
http://commons.wikimedia.org/wiki/File:Comparison_of_pyramids.svg
However, the system refuses to update the image. It is still displaying the oldest version, which has been modified 9 times now.
This is a severe bug and will likely cause frustrated users to stop contributing edits to image and/or encourage them to upload the edit under a new filename, causing duplicates. When a new version is uploaded, all caches must be cleared and all thumbnails regenerated when needed.
Thanks! Timwi