vista/ws2008 remote desktop corrupts some files on XP clients

when I cut&paste any file with .ANI extention from a remote vista or server 2008 to a local XP using remote desktop about 3k of data is appended at the end of the file making it unreadable. did anybody else experience the same issue? I thought it was just a network problem while it was happening when I was using rdp through internet but now I verified it also happens on a local LAN. I've put the ANI files inside my application resources but this issue is still rather annoying.