The download site only provide RPM for Fedora 9 i386. My repository provides RPM for Fedora 9 and 10, for i386, x86_64, ppc and ppc64. Previous Fedora versions doesn't have the required dependencies (p.e. : cairo >= 1.5)

As always :

yum --enablerepo=remi install mysql-workbench

It seems that the table layout is still not saved with the model (64 bits only issue)...

I'm waiting for you feedback on this new beta version.