I have tried to load images for a calendar for several days. All of ht eimages look like a camera on peice of paper with the lower right coner of the paper folded up.
I logged into your account and uploaded an image and it displayed as a proper thumbnail.
Were the files you uploaded in another format before they were saved as jpg?
They were created in GIMP. I exported them in jpg format. I've done this (creating in GIMP, exported to JPGand downloaded to Lulu) several times inthe past.
Have the same issue with JPGs exported from Photoshop.
I've been playing around with this for a while. I tried exporting as JPG with a lower quality setting: didn't work. Exported as TIF: didn't work. Exported as different versions of JPG: didn't work.
I finally ended up using the "Save for Web" option (Ctrl + Alt + Shift + S). I saved the files as 100% quality. Files are smaller than regular JPG export, but they upload into Lulu ok.