The makers of Color Tower Defense
That is a tough error. Very little info out there about it. This post is on the second page when searching for that error in fact..It sounds like it is pointing out a problem with either your version of libpng (upgrade if there is a newer version?) or the image(s) it is trying to load. Is the image one that you made? Maybe try opening it in a paint program and resaving it?Definitely a tough one...
Yeah maybe its just one of those errors that goes away after awhile.