I should just point out that some of the "latest" BIOS versions posted on the Gigabyte download page for some motherboards are labelled as BETA and then stay that way as no further updates are issued. These are usually safe to use and may have to be used, if you want to run the latest processor(s) for example.
As with all things it should also be noted that in the general scheme of things you shouldn't just update your BIOS because there is a new version. The old saying of: "If it ain't broke, don't fix it!" is really important to remember when it comes to BIOS and if your system is running fine then you really don't need to update the BIOS in the majority of cases.