When I make a texture for one of the poser figures I am seeing where the texture doesn't match with the texture on the other side of the seam. So I end up with a line that shows the distortion on the figure during render.

I have poser 8 and would like to know if there is any way to fix this?

If you are using a template the textures must match at the seams (try the clone stamp and a lot of test rendering, or an even fill at the seams in your image editor). SnowSultan has seam guides for most of the popular Poser figures if that is what you are working with. Also, try rendering with texture filtering set to none...

Corection,
set texture filtering to crisp.

When set to none, you loose texture caching.

I don't think there is a "crisp" setting in Poser 8. "None" may be the best you'll do in that version.

I thought that seams sometimes showed up when the min shading rate was too high (which is why they often appear in preview, but not in render). Someone please correct me if I'm wrong.

Quote - If you are using a template the textures must match at the seams (try the clone stamp and a lot of test rendering, or an even fill at the seams in your image editor). SnowSultan has seam guides for most of the popular Poser figures if that is what you are working with. Also, try rendering with texture filtering set to none...

I use old school photoshop 7. I like the idea of using fill at the seams. But I am a little unsure about how to blend it into the texture. Any tips? If there some kind of auto blend type thingy I can do?

@ moriador: yes, you are correct, but that should be set in 2 places, render settings and light settings.  On raytrace lighting, a 0.1 value should clear the problem.

Also try lowering the minimum shading rate to .5 or .2 if you need high quality.