I've been getting red errors in the pop up since around the time of the latest patch (I have only now taken the time to find the cause, and it seems to be CE).

The affected body part seems to change, sometimes it's the leg attack tool, sometimes the thorax, sometimes the mouth.

Any chance for a fix?

Load order:

Harmony
Core
Royalty
Genetic Rim
Combat Extended
Mod Manager

Error:

Command line arguments: -popupwindow
Verse.Log:Message(String, Boolean)
Verse.Root:CheckGlobalInit()
Verse.Root:Start()
Verse.Root_Entry:Start()

RimWorld 1.1.2654 rev672
Verse.Log:Message(String, Boolean)
RimWorld.VersionControl:LogVersionNumber()
Verse.Root:CheckGlobalInit()
Verse.Root:Start()
Verse.Root_Entry:Start()

Combat Extended :: Harmony_GenRadial_RadialPatternCount :: Info: Post GenRadial patch maximum radius: 119.4194
Verse.Log:Message(String, Boolean)
CombatExtended.HarmonyCE.Harmony_GenRadial_RadialPatternCount:Patch()
CombatExtended.HarmonyCE.HarmonyBase:InitPatches()
CombatExtended.Controller:.ctor(ModContentPack)
System.Reflection.MonoCMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoCMethod:InternalInvoke(Object, Object[])
System.Reflection.MonoCMethod:DoInvoke(Object, BindingFlags, Binder, Object[], CultureInfo)
System.Reflection.MonoCMethod:Invoke(BindingFlags, Binder, Object[], CultureInfo)
System.RuntimeType:CreateInstanceImpl(BindingFlags, Binder, Object[], CultureInfo, Object[], StackCrawlMark&)
System.Activator:CreateInstance(Type, BindingFlags, Binder, Object[], CultureInfo, Object[])
System.Activator:CreateInstance(Type, Object[])
Verse.LoadedModManager:CreateModClasses()
Verse.LoadedModManager:LoadAllActiveMods()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.<>c:<Start>b__6_1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.<>c:<UpdateCurrentAsynchronousEvent>b__27_0()
System.Threading.ThreadHelper:ThreadStart_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object)
System.Threading.ThreadHelper:ThreadStart()

Combat Extended :: initialized
Verse.Log:Message(String, Boolean)
CombatExtended.Controller:.ctor(ModContentPack)
System.Reflection.MonoCMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoCMethod:InternalInvoke(Object, Object[])
System.Reflection.MonoCMethod:DoInvoke(Object, BindingFlags, Binder, Object[], CultureInfo)
System.Reflection.MonoCMethod:Invoke(BindingFlags, Binder, Object[], CultureInfo)
System.RuntimeType:CreateInstanceImpl(BindingFlags, Binder, Object[], CultureInfo, Object[], StackCrawlMark&)
System.Activator:CreateInstance(Type, BindingFlags, Binder, Object[], CultureInfo, Object[])
System.Activator:CreateInstance(Type, Object[])
Verse.LoadedModManager:CreateModClasses()
Verse.LoadedModManager:LoadAllActiveMods()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.<>c:<Start>b__6_1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.<>c:<UpdateCurrentAsynchronousEvent>b__27_0()
System.Threading.ThreadHelper:ThreadStart_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object)
System.Threading.ThreadHelper:ThreadStart()

Could not resolve cross-reference to Verse.BodyPartGroupDef named LegAttackTool (wanter=groups)
Verse.Log:Error(String, Boolean)
Verse.DirectXmlCrossRefLoader:TryResolveDef(String, FailMode, Object)
Verse.WantedRefForList`1:TryResolve(FailMode)
Verse.<>c__DisplayClass15_1:<ResolveAllWantedCrossReferences>b__0(WantedRef)
Verse.<>c__DisplayClass6_1`1:<ParallelForEach>b__0(Object)
System.Threading.QueueUserWorkItemCallback:WaitCallback_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.QueueUserWorkItemCallback:System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
System.Threading.ThreadPoolWorkQueue:Dispatch()
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback()

BodyPartRecord with null def. body=GR_Arachnid
Verse.Log:Error(String, Boolean)
Verse.BodyDef:CacheDataRecursive(BodyPartRecord)
Verse.BodyDef:CacheDataRecursive(BodyPartRecord)
Verse.BodyDef:ResolveReferences()
Verse.<>c__DisplayClass14_0:<ResolveAllReferences>b__0(BodyDef)
Verse.DefDatabase`1:ResolveAllReferences(Boolean, Boolean)
System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
System.Reflection.MethodBase:Invoke(Object, Object[])
Verse.GenGeneric:InvokeStaticMethodOnGenericType(Type, Type, String, Object[])
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.<>c:<Start>b__6_1()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.<>c:<UpdateCurrentAsynchronousEvent>b__27_0()
System.Threading.ThreadHelper:ThreadStart_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object)
System.Threading.ThreadHelper:ThreadStart()

Combat Extended :: Ammo injected
Verse.Log:Message(String, Boolean)
CombatExtended.AmmoInjector:Inject()
Verse.LongEventHandler:UpdateCurrentSynchronousEvent(Boolean&)
Verse.LongEventHandler:LongEventsUpdate(Boolean&)
Verse.Root:Update()
Verse.Root_Entry:Update()

Combat Extended :: Bounds pre-generated
Verse.Log:Message(String, Boolean)
CombatExtended.BoundsInjector:Inject()
Verse.LongEventHandler:UpdateCurrentSynchronousEvent(Boolean&)
Verse.LongEventHandler:LongEventsUpdate(Boolean&)
Verse.Root:Update()
Verse.Root_Entry:Update()

VanillaFurnitureExpandedShields.CanInstall() - False
Verse.Log:Message(String, Boolean)
CombatExtended.Compatibility.Patches:Init()
Verse.LongEventHandler:UpdateCurrentSynchronousEvent(Boolean&)
Verse.LongEventHandler:LongEventsUpdate(Boolean&)
Verse.Root:Update()
Verse.Root_Entry:Update()