When I did "yum upgrade", I got Finished Transaction Test Transaction Check Error: file /usr/include/curl/curlbuild.h conflicts between attempted installs of libcurl-devel-7.19.4-1.fc10.i386 and libcurl-devel-7.19.4-1.fc10.x86_64
*** This bug has been marked as a duplicate of bug 488922 ***