What steps will reproduce the problem?
1.Have add on installed with prat 3.0 or stubby (perhaps others, still checking)
2. Have someone log into game in guild.
3.

What is the expected output? What do you see instead?

[so and so has come online]  

Error: Original call failed after running hooks for: ChatFrame_OnEvent
Interface\AddOns\Prat-3.0\services\chatsections.lua:514 bad argument #1 to 'match' (string expected, got table)
Call Chain:
Interface\AddOns\Stubby\Stubby.lua:381 in function
(tail call): ?
[string "*:OnEvent"]:1: in function

is the error i get at first. If i then disable stubby (from auctioneer) I get

Message: Interface\AddOns\Prat-3.0\services\chatsections.lua:514 bad argument #1 to 'match' (string expected, got table)
Time: 08/09/09 03:59:16
Count: 2
Stack: [string "Interface\FrameXML\BasicControls.xml
[C]: ?
[C]: in function `match'
Interface\AddOns\Prat-3.0\services\chatsections.lua:514 in function `SplitChatMessage'
Interface\AddOns\Prat-3.0\addon\addon.lua:521 in function
(tail call): ?
Interface\FrameXML\ChatFrame.lua:2288 in function `ChatFrame_OnEvent'
[string "*:OnEvent"]:1: in function

Locals: (*temporary) = {
67618 = {
}
66869 = {
}
Icehowl = {
}
66331 = {
}
67654 = {
}
Jormungar Behemoth = {
}
67477 = {
}
66683 = {
}
66689 = {
}
Gormok the Impaler = {
}
}
(*temporary) = "%[(.-)%](.+)"
(*temporary) = "string expected, got table"

If i disable both of them, I get

Message: Interface\FrameXML\ChatFrame.lua:2492 bad argument #1 to 'strlen' (string expected, got nil)
Time: 08/09/09 04:01:06
Count: 4
Stack: [string "Interface\FrameXML\BasicControls.xml
[C]: ?
[C]: in function `strlen'
Interface\FrameXML\ChatFrame.lua:2492 in function
(tail call): ?
(tail call): ?
(tail call): ?
(tail call): ?
Interface\FrameXML\ChatFrame.lua:2288 in function `ChatFrame_OnEvent'
[string "*:OnEvent"]:1: in function

Locals: (*temporary) = nil
(*temporary) = "string expected, got nil"

What version of the product are you using?

1.4.5

Do you have an error log of what happened?

provided in what I see section.

Please provide any additional information below.

It has only seemed to pop up since the newet version of titan was uploaded to the site.  On the titan curse page there is one other person commenting about it as well.