[CentOS] Server displaying ?

I figure this is an apache issue, but I dont' know where to look. Since moving my website from an older Redhat installation to my new Centos 4 server (all updates installed), all my web pages display a "?" anywhere I have a non-breaking space. If I do a view source in my browser I see the " " character, but when looking at it on my server via ssh, I see a vertical bar, similar, but not a pipe. And when looking at the source on a different browser I see a ASCII 160 character. But on all browsers, I'm seeing a ? on the display, instead of the non-breaking space.

Anyone know what I need to configure/correct/change in Apache to correct this?

Thanks, Scott