nothing called 'BOOT FULL' there is 'Boot Drive Percent Full' ? 

is this an Extension Attribute ?

No, but I think your original thought was correct. This one shows "26" under the BOOT FULL heading and shows 26%, below.

Thanks,

Jim

Try restarting your browser and clearing caches. That is a variable that is supposed to substituted out when drawing the screen. I see this occasional on other fields, such as headers, etc. 

Tribuin, that's interesting. I'll give that a shot!