I am totally guessing, but I wonder if we did an update/upgrade of IPB back in June and any uploads after that date are being handled differently by IPB and the XF importer isn't recognizing them.
Here are a couple of examples.
New thread on IPB site: http://www.thehunterslair.com/topic/31563-first-pred-bio/
New thread on XF site: http://predatorium.com/index.php?threads/first-pred-bio.20353/
Note the lack of attachments.
Old thread on IPB site: http://www.thehunterslair.com/topic/29584-evilpreds-p2-sculpt-wipupdate-first-pull/
Old thread on XF site: http://predatorium.com/index.php?threads/evilpred´s-p2-sculpt-wip-update-first-pull.18824/
Attachments are present.
I am totally at a loss of why we seem to have gotten over the vast majority of our attachments, but not any since June. I didn't see any error during the import. Any help would be greatly appreciated.