Cygwin 1.7 on win 2008 wierd behaviour with .sys files

[Hrishikesh Date]

I installed cygwin beta on win2008 R2 machine.
Having a strange problem when copying files with 2 DOTs on

$ touch a.sys.exe
$ cp a.sys.exe a.sys
cp: cannot create regular file `a.sys': File exists

I double checked and there is no file named a.sys.

-HD

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