[xwiki-users] Problem with attachment deletion

Hello everyone, I've been having problems with attachment deletion. Basically, xwiki allows me to "delete" the attachment, but the attachment link that displays the file name doesn't get deleted. More specifically, after I delete the attachment, the file disappears, so it seems it gets deleted correctly. However, if I refresh the page, the attachment link reappears. When I click on the attachment, it leads me to another page that says "Error. This template does not exist". What I assume is happening is that the attachment link, or pointer, points to the already deleted file that doesn't exist anymore (like a dangling pointer). I am the administrator and I am allowed to delete the attachment, so it isn't an access control problem. Has anyone else been having this problem? Why does this problem happen? Thanks, Felix Wu