[Lynne]

Space limit is a usergroup option. The one you see in settings is the overall site space limit. But, if you look in the Usergroup Manager, you will see if you set a space amount for that usergroup.

If you look at the link for the attachment, somewhere it should say "attachmentid=xx". You may then look in the attachment table and see if there is a row where attachmentid equals xx. That will tell you if the attachment exists still. Now, in that same row, please note the filedataid for that attachment. I'll call that zz.

Does that link have anything in it like "thumb=yy" ? If so, what? Now, look in the table filedata and see if you can find a row for filedataid zz. Does it have a BLOB size larger than 0 under the field thumbnail?

You said this is only happening in a private forum? So, there is no way we can get a link to a post where you are having the problem?