An update window when i start my wow ???

As usual i deleted cache folder in my wow folder and Launched the game,suddenly an update window pops up and says "World of Warcraft is performing an initial setup of required data files".Does this have something with Warmane or i should be more careful when deleting inside my wow folder ??
Peace..
Edit:
Those are the new character models self updated,i don't know how or why but at least we could get a warning about it that it might happen...What your pulling out Warmane if i may ask ????

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Originally Posted by Curis

Those are the new character models self updated,i don't know how or why but at least we could get a warning about it that it might happen...What your pulling out Warmane if i may ask ????

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What?
You cant really download anything from Warmane.

Quote:

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Originally Posted by Desolution

What?
You cant really download anything from Warmane.

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The client self downloaded the files and i got kinda stuck now in orgrimar without NPC's or portals and even delay from about 4-6 sec ....