What steps will reproduce the problem?
1. I logged in started driving through Dal and must have moused over something

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

Can really say what it was first time I saw it.

What version of the product are you using?

v1.3.2

Do you have an error log of what happened?

Message: ...owTip\libs\LibDogTag-Unit-3.0\LibDogTag-Unit-3.0.lua:210 attempt to index local 'guidToUnits_oldGuid' (a nil value)
Time: 08/26/09 19:59:15
Count: 1
Stack: [string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:18: in function <[string "Interface\FrameXML\BasicControls.xml:<Scrip..."]:4>
(tail call): ?
[C]: ?
...owTip\libs\LibDogTag-Unit-3.0\LibDogTag-Unit-3.0.lua:210 in function <...owTip\libs\LibDogTag-Unit-3.0\LibDogTag-Unit-3.0.lua:201
...owTip\libs\LibDogTag-Unit-3.0\LibDogTag-Unit-3.0.lua:413 in function `func'
...nterface\AddOns\CowTip\libs\LibDogTag-3.0\Events.lua:267 in function <...nterface\AddOns\CowTip\libs\LibDogTag-3.0\Events.lua:260

Locals:

Please provide any additional information below.