optimusvault wrote:I've got Create thumbnail turned on. I'm having a feeling that that is why attachments are not showing up in a lightbox?
Thumbnailed attachments work just fine, but only if they are bigger than the lightbox setting. If they're smaller they will be ignored.
And of course since thumbnails are made at the time of posting, so old posts with thumbs created at a setting even smaller than the current thumbnail or lightbox size will be ignored too.
I always say for best results, set the Lightbox and attachment thumbnail sizes to the same value.