When reporting an issue, please try to reproduce the issue with just Dominos and Dominos_Config running. Dominos reuses a good chunk of the stock UI, and other popular addons, like Move Anything, like to take control of those parts, too.
Firelands patch hit today, dominos is working, but buggrabber/bugsack picked up an lua error

2x [ADDON_ACTION_BLOCKED] AddOn 'Dominos' tried to call the protected function 'MultiBarBottomLeftButton1:Hide()'.
[string "@!BugGrabber/BugGrabber.lua"]:485: in function <!BugGrabber/BugGrabber.lua:485>
[string "=[C]"]: in function Hide' [string "@Blizzard_ActionBar/Classic/ActionButton.lua"]:500: in function ActionButton_HideGrid'
[string "@Blizzard_ActionBar/Classic/MultiActionBars.lua"]:130: in function MultiActionBar_UpdateGrid' [string "@Blizzard_ActionBar/Classic/MultiActionBars.lua"]:111: in function MultiActionBar_ShowAllGrids'
[string "@Blizzard_UIPanels_Game/Cata/SpellBookFrame.lua"]:140: in function <...ddOns/Blizzard_UIPanels_Game/Cata/SpellBookFrame.lua:131>
[string "=[C]"]: in function Show' [string "@Blizzard_UIParentPanelManager/Classic/UIParentPanelManager_Shared.lua"]:606: in function SetUIPanel'
[string "@Blizzard_UIParentPanelManager/Classic/UIParentPanelManager_Shared.lua"]:451: in function ShowUIPanel' [string "@Blizzard_UIParentPanelManager/Classic/UIParentPanelManager_Shared.lua"]:319: in function <...PanelManager/Classic/UIParentPanelManager_Shared.lua:315> [string "=[C]"]: in function SetAttribute'
[string "@Blizzard_UIParentPanelManager/Classic/UIParentPanelManager_Shared.lua"]:1094: in function <...PanelManager/Classic/UIParentPanelManager_Shared.lua:1073>
[string "=[C]"]: in function ShowUIPanel' [string "@Blizzard_UIPanels_Game/Cata/SpellBookFrame.lua"]:63: in function ToggleSpellBook'
[string "TOGGLESPELLBOOK"]:1: in function <[string "TOGGLESPELLBOOK"]:1>

Locals:
_ = Frame {
RegisterEvent = defined @!BugGrabber/BugGrabber.lua:491
0 =
UnregisterEvent = defined @!BugGrabber/BugGrabber.lua:491
SetScript = defined @!BugGrabber/BugGrabber.lua:491
}
event = "ADDON_ACTION_BLOCKED"
events =

Addon Version
11.0.5

World of Warcraft Version
Cata Classic

This one sounds like it cold be a tainting issue. Are you able to replicate with other addons?