there was an "unknown images" contribution in the versions previous to 2.76i. in 2.76i it was replaced by an known "ultra pics". If you look back to version 2.76h you might find the one you need. You'll have to understand how the big image changes you database to confirm that code is right. always backup.
Also, your Car & Truck Model category gets changed to truck-models so, yes, I suggest upgrading. You can try changing the small word limit in the settings in admin first. You may have a version it worked in but I'm pretty sure it never did work.