strange problem with multi of raven shield

[schumy]

OS: Windows XP 5.1 (Build: 2600)
CPU: AuthenticAMD PentiumPro-class processor @ 1665 MHz with 511MB RAM
Video: NVIDIA GeForce2 MX 100/200 (4403)

R6WindowServerListBox Transient.R6WindowServerListBox0 (Function UWindow.UWindowListControl.GetItemAtIndex:0060) Runaway loop detected (over 1000000 iterations)

History: FFrame::Serialize <- UObject::ProcessEvent <- (InteractionMaster Transient.InteractionMaster0, Function Engine.InteractionMaster.Process_PostRender) <- UInteractionMaster::MasterProcessPostRender <- UGameEngine:raw <- UWindowsViewport::Repaint <- UWindowsClient::Tick <- ClientTick <- UGameEngine::Tick <- UpdateWorld <- MainLoop