It still sounds like you're using a transparent color as an outline. Just temporarily change them to something real obvious and see if you can see any holes in the tiles.
And remember, if you have lots of extra pallette spaces when you're done, waste them on something useless:
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GENERATION 22: The first time you see this, copy it into your sig on any forum and add 1 to the generation. Social experiment.
<i>"This picture shows me that the gray bird man is just a bully and picks on smaller birds. Just because he has no friends and takes it out on others smaller than him to look good. I can see in the parrats eyes that it does however have a understanding of the gray bird man and is upset about getting cut."</i> - Speeza on cartoon birds.
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