WowAce

What steps will reproduce the problem?
0. Set settings as shown in screenshot.
1. Join a party and enable yourself as master looter
2. Kill something with a drop
3. Disband the group (in my case the other person left)
4. Try to assign loot to yourself. You will get the error below, and more importantly the loot will NOT be assigned

What is the expected output? What do you see instead?
Date: 2012-12-07 13:04:00
ID: -1
Error occured in: Global
Count: 1
Message: SendChatMessage(): Unknown chat type
Debug:
   [C]: ?
   [C]: ?
   [C]: SendChatMessage()
   XLootMaster\XLootMaster.lua:91:
      XLootMaster\XLootMaster.lua:86
   XLootMaster\XLootMaster.lua:456: OnAccept()
   ..\FrameXML\StaticPopup.lua:3897: StaticPopup_OnClick()
   [string "*:OnClick"]:1:
      [string "*:OnClick"]:1
Locals:
(*temporary) = "Ashel awarded: [Steadfast Footman's Medallion]"
(*temporary) = "AUTO"

AddOns:
...
  XLootMaster, vz1a-beta
...

What version of the product are you using?
vz1a-beta

Please provide any additional information below.
I tried multiple reloads to no effect.
I had to disable the addon entirely before I could loot my item.