Emacs backup woes with "b~"

[Joe]

Hey I can't seem to figure out why emacs is saving files in the form
"b~myfile.adb" in my directories.

I have the following in my .emacs

(setq
 backup-by-copying t
 backup-directory-alist
 '(("." . "~/.emacs.d/.emacs-backups"))
 delete-old-versions t
 kept-new-versions 3
 kept-old-versions 2
 version-control t)

The "b~*" files are created right after I compile.

Thanks,

Joe