... It's not recommended to upload files greater than a few hundred K through a browser. ... When enabled, all files in a topic's attachment directory are shown as attachments to the topic - even if they were directly copied to the directory and never attached by using an 'Attach' link. ... Changed: . ... As a workaround, you can change the comment to indicate an attachment file is being worked on - the comment on the specific version isn't lost, it's there when you list all versions of the attachment. ...