What steps will reproduce the problem?
1. Play on a deDE client.
2. Select any instance map, except the ones, which are named the same in english and german.
3.

What is the expected output? What do you see instead?
An Error (see below), no map.

What version of the product are you using?
1.2.1

Do you have an error log of what happened?

[2009/04/26 16:47:41-2-x1]: Mapster-1.2.1\InstanceMaps.lua:384 attempt to concatenate local 'mapFileName' (a nil value)
Mapster-1.2.1\InstanceMaps.lua:324 in function <Interface\AddOns\Mapster\InstanceMaps.lua:315
(tail call): ?:
Mapster-1.2.1\InstanceMaps.lua:258 in function <Interface\AddOns\Mapster\InstanceMaps.lua:255
(tail call): ?:
Interface\FrameXML\UIDropDownMenu.lua:563 in function <Interface\FrameXML\UIDropDownMenu.lua:539
<in C code>: in function `UIDropDownMenuButton_OnClick'
<string>:"*:OnClick":1: in function <[string "*:OnClick"]:1>

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Please provide any additional information below.
Repackage with new babble-zone?^^