What steps will reproduce the problem?
1. Open the raid logs.
2. Open the logs' of someone in the guild who also participate at a raid.
3. Re-open the raid logs, it don't appear. It's yet the member's logs.

What version of the product are you using?
2.6.0-BETA4

Do you have an error log of what happened?

Message: Interface\AddOns\QDKP_V2\Code\Logging\DB.lua:382 bad argument #1 to 'pairs' (table expected, got nil)
Time: 10/01/09 15:10:31
Count: 2
Stack: [string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:18: in function <[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:4>
[C]: ?
[C]: in function `pairs'
Interface\AddOns\QDKP_V2\Code\Logging\DB.lua:382 in function `QDKP2log_SessionStatistics'
Interface\AddOns\QDKP_V2\Code\Logging\DB.lua:352 in function `QDKP2log_ParsePlayerLog'
Interface\AddOns\QDKP2_GUI\Code\Log.Player.Lua:31 in function `GetList'
Interface\AddOns\QDKP2_GUI\Code\Log.lua:120 in function `Refresh'
Interface\AddOns\QDKP2_GUI\Code\Log.lua:96 in function `Show'
Interface\AddOns\QDKP2_GUI\Code\Log.lua:108 in function `Toggle'
[string "*:OnClick"]:2: in function <[string "*:OnClick"]:1>

Locals: (*temporary) = nil
(*temporary) = "table expected, got nil"
 = <function> defined =[C]:-1

Please provide any additional information below.
Sorry for my english, I'm french. ^^