Code:
Message: SendChatMessage(): Invalid escape code in chat message
Time: 12/17/10 13:46:48
Count: 15
Stack: (tail call): ?
[C]: ?
[C]: in function `SendChatMessage'
Interface\AddOns\Jamba-Talk\JambaTalk.lua:456: in function <Interface\AddOns\Jamba-Talk\JambaTalk.lua:439>
(tail call): ?
...ddOns\Decursive\Libs\AceComm-3.0\ChatThrottleLib.lua:416: in function `SendChatMessage'
Interface\AddOns\Jamba\JambaCommunications.lua:745: in function `SendChatMessage'
Interface\AddOns\Jamba-Talk\JambaTalk.lua:519: in function `ForwardWhisperToMaster'
Interface\AddOns\Jamba-Talk\JambaTalk.lua:484: in function `?'
...ite\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:146: in function <...ite\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:146>
[string "safecall Dispatcher[16]"]:4: in function <[string "safecall Dispatcher[16]"]:4>
[C]: ?
[string "safecall Dispatcher[16]"]:13: in function `?'
...ite\Libs\CallbackHandler-1.0\CallbackHandler-1.0.lua:91: in function `Fire'
...ddOns\AuctionLite\Libs\AceEvent-3.0\AceEvent-3.0.lua:120: in function <...ddOns\AuctionLite\Libs\AceEvent-3.0\AceEvent-3.0.lua:119>

Locals: Sometimes debuglocals() returns nothing, it's one of those times... (FYI: This last sentence (only) is a HotFix from Decursive to prevent a C stack overflow in the new Blizzard error handler and thus giving you the opportunity to send this debug report to the author of the problematic add-on so he/she can fix it)
I get this with every Real-ID message that comes through.