Disk test getting wrong info

[Rob Munsch <rmunsch (at) solutionsforprogress.com>]

Using hobbit 4.2, i have one host that keeps alternating between yellow 
and green.

From the commandline on the host, df consistently gets

-----
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda3             31004488   8095932  22908556  27% /
date.tbb:/home        83883516  70860176  13023340  85% /home
date.tbb:/shared       2097084    333308   1763776  16% /shared
-----

(and df -l omits the latter two of course).  However when the status 
most recently went yellow, i saw on the hobbit status page:

-----
- Filesystems NOT ok

Expected strings (Capacity and Mounted) not found in df output

             total       used       free     shared    buffers     cached
Mem:       4150856    2530912    1619944          0      36424     426328
-/+ buffers/cache:    2068160    2082696
Swap:      2097136     434284    1662852
-----

Which looks a lot like memory info to me!
The last time it went yellow i saw a bunch of network interface stats.

I don't know how but every few checks the client seems to run the wrong 
test for disk - or at least the wrong data is making it over in place of 
df info.  Anyone ever see this happen or know how it could..?

--
Rob Munsch
Solutions For Progress IT
www.solutionsforprogress.com