As of right now there is no fix for this issue other than a reboot of your phone. This problem occurred prior to the official .893 update, and while it was fixed on many bionics after the update it is still an issue for some.
Sent from my DROID BIONIC using DroidForums
When you check for an update, you are pinging the carrier, who checks to see if you're scheduled to receive it. If you are, then you'll get notice that an update is available to download. This means that if you're scheduled to get the update on, say, February 2nd at 3:47am, your phone will say that it's "up to date" until then despite the fact that others on this forum had been getting it since January 23rd.
Originally Posted by sharkattack99
Now about the .901 update; it only went to a couple dozen people. It was captured. so if you want it install it manually, there are several threads on where to get it and how to install it.