Weird stuff printed out by emacs rgrep

[Geoff Bache]

Hi,

Whenever I run M-x rgrep (which is a lot) I get exactly six lines of

[: 320: Illegal number: 7
[: 320: Illegal number: 7
[: 320: Illegal number: 7
[: 320: Illegal number: 7
[: 320: Illegal number: 7
[: 320: Illegal number: 7

printed between the find command and the output (which are both correct).
This seems to happen independently of the files and the search. Does anyone know
what it means? It seems to refer to a file called '[', line 320, but
there is no file
with that name anywhere on my file system.

It's not fatal but it's very annoying :)

I'm running emacs 22.1.1 on Ubuntu (Hardy Heron)

Thanks for any help,
Geoff