Trouble with Command for Eshell

[Lorenzo Isella]

Dear All,
I have recently updated my system (Debian) to the new stable and I am 
experiencing a few minor glitches.
I have in my .emacs file the following




(fset 'auxiliary
  (lambda (&optional arg) "Keyboard macro." (interactive "p") (kmacro-exec-ring-item 
(quote ([21 escape 120 101 115 104 101 108 108 return escape 120 114 101 110 97 109 right right return 97 117 120 
105 108 105 97 114 121 return] 0 "%d")) arg)))


Which means that the combination

Alt+x auxiliary

opens a second emacs shell and names it auxiliary.
However, right now, the same command opens something like >20 emacs shells...
Does anyone know how I should fix this?
I am no emacs guru and this is an (ugly) macro I recorded ages ago, but which 
has served me well until now.
Cheers

Lorenzo