When i try to install SynCE via. yum on F7.x86_64 i get dependency errors Package synce needs librapi, this is not available. Package synce needs librra, this is not available. Package synce needs libsynce, this is not available. Package libopensync-plugin-synce needs libsynce.so.0()(64bit), this is not available. Package libopensync-plugin-synce needs librapi.so.2()(64bit), this is not available. Package libopensync-plugin-synce needs librra.so.0()(64bit), this is not available.
Actually all dependencies in F7 should be clean now. The synce package has been obsoleted by a split into multiple packages. If there are still problem then reopen the bug but afaik all applications should now depend on the right libraries and the old synce package should not be needed anymore.