There seems to be an error with Visible Pants, relating to the patch file...
XML RimWorld.ApparelProperties defines the same field twice: worngraphicPath.
Field contents: Pants/Pants.
Whole XML:
<apparel><worngraphicPath>Things/Pawn/Humanlike/Apparel/Bodywear_Clothing/Pants/Pants</worngraphicPath><bodyPartGroups><li>Legs</li></bodyPartGroups><layers><li>OnSkin</li></layers><tags><li>Outlander</li><li>Spacer</li></tags><defaultOutfitTags><li>Worker</li><li>Soldier</li></defaultOutfitTags><worngraphicPath>Pants/Pants</worngraphicPath></apparel>
Verse.Log:Error(String)
Verse.DirectXmlToObject:ObjectFromXml(XmlNode, Boolean)
System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
System.Reflection.MethodBase:Invoke(Object, Object[])
Verse.DirectXmlToObject:ObjectFromXml(XmlNode, Boolean)
System.Reflection.MonoMethod:InternalInvoke(Object, Object[], Exception&)
System.Reflection.MonoMethod:Invoke(Object, BindingFlags, Binder, Object[], CultureInfo)
System.Reflection.MethodBase:Invoke(Object, Object[])
Verse.<AllDefsFromAsset>c__Iterator226:MoveNext()
Verse.ModContentPack:LoadDefs(IEnumerable`1)
Verse.LoadedModManager:LoadAllActiveMods()
Verse.PlayDataLoader:DoPlayLoad()
Verse.PlayDataLoader:LoadAllPlayData(Boolean)
Verse.Root:<Start>m__853()
Verse.LongEventHandler:RunEventFromAnotherThread(Action)
Verse.LongEventHandler:<UpdateCurrentAsynchronousEvent>m__851()
Luckily I still had the version from the 17th so I reverted to that.