[CentOS] bogus error message from yum update for gmime and gmime-sharp

When I do "yum update gmime gmime-sharp" I get:

... --> Missing Dependency: gmime = 2.2.10-5.el5.centos is needed by package gmime-sharp-2.2.10-5.el5.centos.i386 (installed) Error: Missing Dependency: gmime = 2.2.10-5.el5.centos is needed by package gmime-sharp-2.2.10-5.el5.centos.i386 (installed) ...

But both of these are already installed:

# rpm -q gmime gmime-sharp gmime-2.2.10-5.el5.centos gmime-sharp-2.2.10-5.el5.centos

So:

# package-cleanup --problems Setting up yum Reading local RPM database Processing all local requires No problems found

Running the above "yum update ..." again yields the same bogus error messages. I've had problems with these two packages before. Why can't yum understand rpm for them?

Thanks for the wisdom.