If I remove a file using /forum/attachments, it remains in the upload folder on server.

My case: I uploaded a file 20110425_listview.jpg to our forum. Later I decided to chage it and upload as PNG. Ok, I removed the JPG from the post and uploaded the new PNG using the user's attachments page. However, I still see the following two files in the upload folder:

u2.20110425_listview.jpg.yafupload

u2.20110425_listview.png.yafupload