Rawhide: similar systems reports different operating system

[Antonio M]

I have two F11 systems with similar packages.
On both I have 	
        fedora-release 10.91-1 	         	Fedora release files
	fedora-release-notes 10.0.0-1 		Release Notes for Fedora 10
	livna-release 1-1 	                 	rpm.livna.org repository files
	rpmfusion-free-release 10.90-1 	 	RPM Fusion (free) Repository Configuration
	rpmfusion-nonfree-release 10.90-1 	 	RPM Fusion (nonfree) Repository
Configuration

but Webmin reports one as:
 Operating system 	Redhat Linux Fedora 10.90
and the other as:
Operating system 	Redhat Linux Fedora 10.91

Why???

-- 
Antonio Montagnani
Skype : antoniomontag