I'm using version 3.2.0 on retail, and receive the following error on the character that has pets in her bag.

436x Baggins\Baggins-v3.2.0.lua:1311: Usage: GetPetInfoBySpeciesID(speciesID)
[string "=[C]"]: in function GetPetInfoBySpeciesID' [string "@Baggins\Baggins-v3.2.0.lua"]:1311: in function <Baggins\Baggins.lua:1306> [string "@Baggins\Baggins-v3.2.0.lua"]:1323: in function <Baggins\Baggins.lua:1319> [string "=[C]"]: ? [string "@Baggins\Baggins-v3.2.0.lua"]:1437: in function SortItemList'
[string "@Baggins\Baggins-v3.2.0.lua"]:1233: in function UpdateSectionContents' [string "@Baggins\Baggins-v3.2.0.lua"]:1149: in function UpdateSection'
[string "@Baggins\Baggins-v3.2.0.lua"]:1123: in function ReallyUpdateBags' [string "@Baggins\Baggins-v3.2.0.lua"]:771: in function ?'
[string "@Baggins\Baggins-v3.2.0.lua"]:133: in function <Baggins\Baggins.lua:125>

Locals:
(*temporary) = nil

should be fixed in v3.2.1. Thanks!