Ineffective upload when uploading by parts

[bilbo]

If you select to upload your edits by individual elements and the uploaded node that you have deleted is already deleted, JOSM will skip it and retry/continue the upload, however, between uploading each node, JOSM tries to update the changeset with the same comment and tags again and again.

So I see in tcpdump something like this:
PUT /api/0.6/changeset/N HTTP/1.1
POST /api/0.6/changeset/N/upload HTTP/1.1
PUT /api/0.6/changeset/N HTTP/1.1
POST /api/0.6/changeset/N/upload HTTP/1.1
....

This bug affects only the case where there is automatic retry because of node you tried to delete is alrady deleted. In normal case (no errors during upload) JOSM behaves fine.