Here's one of mine (I have an Eros cel w/ a 
correctin layer as well, but I don't really know 
what they corrected 'case it's firmly stuck o.o)

This is a Gokudo-kun Manyuuki cel. It's oversize, 
and they made an oversized corection layer for 
the lines in Prince's (the blue-haired bishy) 
hair, as well as some of the darker highlights, 
and the light higlight by Jin's hand. They also 
improved his headband at the top of his head, it 
was the wrong shade of green if I recall (not 
looking at the cel right now ^^;;). His eyes were 
also wrong (devoid of highlights)...apparently 
the animator who did this one was on crack XD

-Misha-chan