We'll try to disable lines when they produce an error. This may cause confusion though. :\

diff --git a/Modules/UnitTooltip/UnitTooltip.lua b/Modules/UnitTooltip/UnitTooltip.lua
index f75acfe..e6ddd72 100644
--- a/Modules/UnitTooltip/UnitTooltip.lua
+++ b/Modules/UnitTooltip/UnitTooltip.lua
@@ -953,7 +953,7 @@ function mod:CreateLines()
             local update = v.update or 0
             v.update = 0
             if v.left and v.leftUpdating then v.update = update end
-            llines[j].leftObj = v.left and WidgetText:New(mod.core, v.name .. " (left)", copy(v), 0, 0, v.layer or 0, StarTip.db.profile.errorLevel, widgetUpdate)
+            llines[j].leftObj = v.left and WidgetText:New(mod.core, "StarTip.UnitTooltip:" .. v.name .. ":left:", copy(v), 0, 0, v.layer or 0, StarTip.db.profile.errorLevel, widgetUpdate)

             v.value = v.right
             v.outlined = v.rightOutlined
@@ -962,7 +962,7 @@ function mod:CreateLines()
             v.color = v.colorR
             v.maxWidth = v.maxWidthR
             v.minWidth = v.minWidthR
-            llines[j].rightObj = v.right and WidgetText:New(mod.core, v.name .. " (right)", copy(v), 0, 0, v.layer or 0, StarTip.db.profile.errorLevel, widgetUpdate)
+            llines[j].rightObj = v.right and WidgetText:New(mod.core, "StarTip.UnitTooltip: " .. v.name .. " (right)", copy(v), 0, 0, v.layer or 0, StarTip.db.profile.errorLevel, widgetUpdate)

            if v.left then
                llines[j].leftObj.fontObj = _G[v.name .. "Left"] or CreateFont(v.name .. "Left")
diff --git a/StarTip.lua b/StarTip.lua
index b435e55..519b3bd 100644
--- a/StarTip.lua
+++ b/StarTip.lua
@@ -1,3 +1,5 @@
+local addonName, addon = ...
+
 _G["StarTip"] = LibStub("AceAddon-3.0"):NewAddon("StarTip", "AceConsole-3.0", "AceHook-3.0", "AceEvent-3.0", "AceTimer-3.0", "AceComm-3.0", "AceSerializer-3.0")
 StarTip.version = GetAddOnMetadata("StarTip", "Version") or ""

@@ -29,7 +31,56 @@ environment.StarTip = StarTip
 environment._G = _G
 environment.L = L

+local BugGrabber = BugGrabber
+
+local function disableUT(name)
+	local UT = StarTip:GetModule("UnitTooltip")
+	for k, v in pairs(UT.db.profile.lines) do
+		if(v.name == name) then
+			UT.db.profile.lines[k].enabled = false
+			UT:CreateLines()
+		end
+	end
+end
+
+local onError
+do
+	local lastError = nil
+	function onError(event, errorObject)
+		for k, v in pairs(addon:GetErrors(BugGrabber:GetSessionId())) do
+			if type(v.message) == "string" then
+				v.message:gsub('t.*StarTip\.UnitTooltip:(.*):left:.*', function(name)
+					disableUT(name)
+				end)
+				v.message:gsub('t.*StarTip\.UnitTooltip:(.*):right:.*', function(name)
+					disableUT(name)
+				end)
+			end
+		end
+	end
+end
+

+-- Borrowed from BugSack
+do
+        local errors = {}
+        function addon:GetErrors(sessionId)
+                -- XXX I've never liked this function, maybe a BugGrabber redesign is in order,
+                -- XXX where we have one subtable in the DB per session ID.
+                if sessionId then
+                        wipe(errors)
+                        local db = BugGrabber:GetDB()
+                        for i, e in next, db do
+                                if sessionId == e.session then
+                                        errors[#errors + 1] = e
+                                end
+                        end
+                        return errors
+                else
+                        return BugGrabber:GetDB()
+                end
+        end
+end

 local LDB = LibStub("LibDataBroker-1.1"):NewDataObject("StarTip", {
 	type = "data source",
@@ -403,6 +454,12 @@ local menuoptions = {
 }

 function StarTip:OnInitialize()
+
+	if BugGrabber then
+		BugGrabber.RegisterCallback(addon, "BugGrabber_BugGrabbed", onError)
+		BugGrabber.RegisterCallback(addon, "BugGraabber_EventGrabbed", onError)
+	end
+
 	self.db = LibStub("AceDB-3.0"):New("StarTipDB", defaults, "Default")
 	self.db.RegisterCallback(self, "OnProfileChanged", "RefreshConfig")
 	self.db.RegisterCallback(self, "OnProfileCopied", "RefreshConfig")
@@ -1008,3 +1065,4 @@ function StarTip:MODIFIER_STATE_CHANGED(ev, modifier, up, ...)
 	end
 end

+