[MuffinManKen]

I had another look at one of the stack traces and there is no actual AutoBar code in it (stack trace follows). It's just erroring out in AutoBar's copy of CallbackHandler which is newer than the one that seems to ship with Bagnon.
Could there have been a breaking change in CallbackHandler and Bagnon isn't handling it?

2x ...Bar\libs\CallBackHandler-1.0\CallbackHandler-1.0-7.lua:51: [string "safecall Dispatcher[5]"]:1: chunk has too many syntax levels
[C]: ?
...Bar\libs\CallBackHandler-1.0\CallbackHandler-1.0-7.lua:51: in function <...Bar\libs\CallBackHandler-1.0\CallbackHandler-1.0.lua:25>
...Bar\libs\CallBackHandler-1.0\CallbackHandler-1.0-7.lua:55: in function <...Bar\libs\CallBackHandler-1.0\CallbackHandler-1.0.lua:54>
...Bar\libs\CallBackHandler-1.0\CallbackHandler-1.0-7.lua:90: in function Fire' ...AutoBar\libs\LibDataBroker-1.1\LibDataBroker-1.1-4.lua:31: in function <...AutoBar\libs\LibDataBroker-1.1\LibDataBroker-1.1.lua:22> BugSack\ldb.lua:36: in function <BugSack\ldb.lua:33> [C]: in functionUpdateDisplay'
BugSack\core.lua:61: in function <BugSack\core.lua:46>
[string "safecall Dispatcher[2]"]:4: in function <[string "safecall Dispatcher[2]"]:4>
[C]: ?
[string "safecall Dispatcher[2]"]:13: in function ?' ...Bar\libs\CallBackHandler-1.0\CallbackHandler-1.0-7.lua:90: in functionFire'
...
Bagnon\components\frame.lua:60: in function Update' Bagnon\components\frame.lua:50: in functionRegisterSignals'
...s\Bagnon\external\Wildpants\components\frameBase.lua:18: in function OnShow' ...s\Bagnon\external\Wildpants\components\inventory.lua:12: in function <...s\Bagnon\external\Wildpants\components\inventory.lua:11> [C]: in functionShow'
FrameXML\UIParent.lua:3131: in function ShowUIPanel' ...aceBagnon\external\Wildpants\core\frames.lua:54: in function <...aceBagnon\external\Wildpants\core\frames.lua:50> (tail call): ? ...s\Bagnon\external\Wildpants\features\autoDisplay.lua:167: in functionToggleAllBags'
[string "OPENALLBAGS"]:1: in function <[string "OPENALLBAGS"]:1>

Locals:
(*temporary) = nil
(*temporary) = "[string "safecall Dispatcher[5]"]:1: chunk has too many syntax levels"