FC4 users are advised to not use Sun's Java RPM. It contains Provides that conflict with names used in FC4's packages, meaning Sun Java might disappear from an installed system during package upgrade operations. FC4 users should use either jpackage's RPM or install manually the Sun Java tarball into /opt. Sun Java 1.5+ is recommended for stability purposes. Version of release notes this bug refers to: Fedora Core 4 final release
Thanks for the bug report, should make release.