Upgrading to Snow Leopard makes my programs no longer link to ports

[Paul Simonson]

Help!  I have recently upgraded to Snow Leopard and upgraded to the new 
MacPorts for Snow Leopard (and I completely removed the old version of 
MacPorts).  I have tried to reinstall my ports.  The ports download and compile 
fine, but when I try to link to them (for example, to freeimage.a) in XCode, I get 
the following messages:

Warnings: in /opt/local/libfreeimage.dylib, file is not of required architecture

and then all the files that use the freeimage library produce errors, saying 
symbols not found.  First of all, why does it return an error about freeimage.dylib 
when I am trying to link to freeimage.a?  Also, what can I do to get the 
architecture problems to go away?  Change settings in XCode?  Change settings in 
MacPorts?  This same type of error occurs for any library I try to link to.

Any help would be greatly appreciated!