Index: issues_controller.rb
===================================================================
--- issues_controller.rb	(revision 19478)
+++ issues_controller.rb	(working copy)
@@ -189,6 +189,7 @@
     begin
       saved = save_issue_with_child_records
     rescue ActiveRecord::StaleObjectError
+      @issue.detach_saved_attachments
       @conflict = true
       if params[:last_journal_id]
         @conflict_journals = @issue.journals_after(params[:last_journal_id]).to_a