Certain tags, when searched for, give 1 page of results but no more, even though there are more results. This seems to be because they are replaced by an alias... but only some aliased tags do this. I suspect this happens for aliases that have a negative count in the alias listings. Flat_chest and anal_creampie, for instance.

Searching for what the aliased-into tag is works. Small_breasts returns all the results that flat_chest should've given.

Huh. Yeah, for instance, the url http://www.e621.net/post?page=3&tags=flat_chest returns page 3 of the results for flat_chest, but there's no bar of page links for going to page 2 or 1, even though you can access them by changing the url directly.