Not sure what is causing this....

5x Usage: self:SetNormalTexture(asset)
[string "=[C]"]: in function SetNormalTexture' [string "@Interface/AddOns/CT_Core/CT_Core_Chat.lua"]:648: in function <Interface/AddOns/CT_Core/CT_Core_Chat.lua:627> [string "@Interface/AddOns/CT_Core/CT_Core_Chat.lua"]:669: in function <Interface/AddOns/CT_Core/CT_Core_Chat.lua:665> [string "@Interface/AddOns/CT_Core/CT_Core_Chat.lua"]:678: in function <Interface/AddOns/CT_Core/CT_Core_Chat.lua:674> [string "@Interface/AddOns/CT_Core/CT_Core_Chat.lua"]:1214: in function chatupdate'
[string "@Interface/AddOns/CT_Core/CT_Core.lua"]:234: in function updateFunc' [string "@Interface/AddOns/CT_Library/CT_Library.lua"]:978: in function setOption'
[string "@Interface/AddOns/CT_Library/CT_Library.lua"]:1723: in function <Interface/AddOns/CT_Library/CT_Library.lua:1718>

Locals:
(*temporary) = "Usage: self:SetNormalTexture(asset)"

Thanks for the bug report. It was caused by the method of hiding chat box draggable corners when you don't mouseover them.

This will be fixed in the next version.