WowAce

What steps will reproduce the problem?
Lua errors are spammed when I get in combat and any shielding happens. This doesn't happen with my shields because if I attack a dummy and
heal myself I don't get those. However, getting in a BG and in combat will immediately pop them. The errors are about 1-2 per second.

What Grid2 version and language of WoW are you using?
r695 and English EU.

Do you have an error log of what happened?

Message: Interface\AddOns\Grid2\modules\StatusShields.lua:50: attempt to compare number with boolean
Time: 11/29/12 14:05:41
Count: 12
Stack: Interface\AddOns\Grid2\modules\StatusShields.lua:50: in function `UpdateShields'
Interface\AddOns\Grid2\modules\StatusShields.lua:77: in function `?'
...Log\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:147: in function <...Log\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:147>
[string "safecall Dispatcher[18]"]:4: in function <[string "safecall Dispatcher[18]"]:4>
[C]: ?
[string "safecall Dispatcher[18]"]:13: in function `?'
...Log\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:92: in function `Fire'
...ce\AddOns\AutoLog\Libs\AceEvent-3.0\AceEvent-3.0.lua:120: in function <...ce\AddOns\AutoLog\Libs\AceEvent-3.0\AceEvent-3.0.lua:119>

Locals: <none>

Please provide any additional information below.
I've already tried resetting the addon settings. This never happened before 5.1.

Solved editing:

local unit= Grid2:GetUnitidByGUID( select(9,...) )

to

local unit= Grid2:GetUnitidByGUID( select(10,...) )

at line 50 of StatusShield.lua