I think it's in regards to this Stanzilla/WoWUIBugs#453

1x [ADDON_ACTION_BLOCKED] AddOn 'Ace3' tried to call the protected function 'Frame:SetPassThroughButtons()'.
[string "@Interface/AddOns/!BugGrabber/BugGrabber.lua"]:481: in function <Interface/AddOns/!BugGrabber/BugGrabber.lua:481>
[string "=[C]"]: in function SetPassThroughButtons' [string "@Interface/AddOns/SilverDragon_Overlay/pins.lua"]:30: in function OnAcquired'
[string "@Interface/AddOns/Blizzard_MapCanvas/Blizzard_MapCanvas.lua"]:201: in function AcquirePin' [string "@Interface/AddOns/SilverDragon_Overlay/worldmap.lua"]:52: in function RefreshAllData'
[string "@Interface/AddOns/SilverDragon_Overlay/worldmap.lua"]:190: in function UpdateWorldMapIcons' [string "@Interface/AddOns/SilverDragon_Overlay/module.lua"]:201: in function ?'
[string "@Interface/AddOns/Ace3/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:109: in function <...Ons/Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua:109>
[string "=[C]"]: ?
[string "@Interface/AddOns/Ace3/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:19: in function <...Ons/Ace3/CallbackHandler-1.0/CallbackHandler-1.0.lua:15>
[string "@Interface/AddOns/Ace3/CallbackHandler-1.0-8/CallbackHandler-1.0.lua"]:54: in function `Fire'
[string "@Interface/AddOns/Ace3/AceEvent-3.0-4/AceEvent-3.0.lua"]:120: in function <Interface/AddOns/Ace3/AceEvent-3.0/AceEvent-3.0.lua:119>

Locals:
_ = Frame {
RegisterEvent = defined @Interface/AddOns/!BugGrabber/BugGrabber.lua:487
0 =
UnregisterEvent = defined @Interface/AddOns/!BugGrabber/BugGrabber.lua:487
SetScript = defined @Interface/AddOns/!BugGrabber/BugGrabber.lua:487
}
event = "ADDON_ACTION_BLOCKED"
events =

Commenting out the line 29-31 in pins.lua seems to removes the error even though it's just a quick patch while waiting for a fix.

    --if self.SetPassThroughButtons then
    --    self:SetPassThroughButtons("")
    --end