Map.wz courrupted each "big" patch! No wz edit!

Describe the problem. Be as specific as possible!:
Everytime a new patch comes out, (ie v126 to v127), I have been unable to patch Maplestory, and it's been happening for a while now. The error each time when I try to patch is always Map.wz is corrupted. I did not do any .wz editing to any of my files.

Yes, I have tried to re-download. Especially annoying when I always have to redownload like 5 times, because four times it would give me an installation error (-40) (<-- Why does this happen too?)

 Installation Error Code

Windows 7, 64 bit.

Any help would be appreciated!

im having this issue on one of my laptops also ;[ i cant seem to patch or even install a fresh copy.

I get this problem occasionally too. I just bite the bullet and redownload the game.