.DS_Store already exists???

[spawnerbr]

I'm using here the last version of Mountain Lion.
I don't know why, but sometimes when I try to copy folders with files from different Hard Disks, the finder gives to me that message:

The operation can't be completed because an item with the name ".DS_Store" already exists.

I thinked the problem was with the source Hard Disk from my copy, but if I try to copy the same folders on my real macbook or on a real mac pro, it doesn't happens.
Only here in Mountain Lion (x86) I got this.

Any clues?? Thanks.

 

[eelhead]

It might be a corrupted permissions issue, so you may want to check permissions on the drive and/or the folder into which you're failing to copy files with disk utility.

Also could be a drive formatting issue, see here; https://discussions.apple.com/thread/2286628?start=0&tstart=0

 

[spawnerbr]

But why it doesn't happens on real macbook, real mac pro and another x86 with snow leopard?
And it is not my boot system hard disk. Is an external hard disk.