ESXi Manufacturer/Model String Corrupt -> Can't add to vCenter

I previously installed ESXi 5.0u1 on a Supermicro X9SCL.  In the summary tab, the Manufacturer and Model always displayed corrupt:

http://i.imgur.com/CMe9v.png

I have since upgraded to ESXi 5.1 and the problem persists.  It wasn't a problem, but it appears to prevent me from adding the host to vCenter:

http://imgur.com/VtCXr

Therefore I would like to get it fixed.  Where is this data stored?

As a side note, I have a fresh ESXi 5.1 install (on an identical machine) that correctly displays this information.

Thoughts?