Hello   We have made improvements in how we publish updates, but sometimes mistakes are made. Without going into great detail, whenever a back-end change is made regarding driver product assignment it used to change the release date. We now have processes in place to make changes to an item like a driver without affecting the release date. It looks like this was accidentally republished instead of updated. Please reference the release notes in the event the publish date on the site seems incorrect. The release notes on the download page contain the actual release date. We will not make changes to a driver or firmware without changing the revision. You should be fine to update to 2.5.5. Thanks
I see that BIOS version 2.4.3 for the PowerEdge R730 has (apparently) been re-published as of yesterday (10/5/2017).  However, BIOS 2.5.5 was published on 9/22/2017 (and only updated yesterday). Our R730s are already running 2.4.3 (and have been for months).  Did this re-publishing include some kind of fix for 2.4.3 that, for whatever reason, didn't warrant a revision number increment?  Is there any reason to not upgrade to BIOS 2.5.5?
R730 BIOS 2.4.3 vs 2.5.5