WARNING: Forwarding loop detected for

Hello,

From yesterday squid logs regularly in cache.log:

2000/03/30 13:29:58| WARNING: Forwarding loop detected for:
GET /squid-internal-periodic/store_digest HTTP/1.0
Accept: application/cache-digest
Accept: text/html
Via: 0.0 cache.c2m.univ-st-etienne.fr:3128 (Squid/2.3.STABLE2), 1.0
cache.univ-s
t-etienne.fr:3128 (Squid/2.3.STABLE1)
X-Forwarded-For: unknown, 161.3.5.56
Host: janon.univ-st-etienne.fr:3128
Cache-Control: max-age=259200
Connection: keep-alive

What does it mean ?

-- 
_______________________________________________________________________
Magali BERNARD (Magali.Bernard@univ-st-etienne.fr)
CRITeR - 23 rue du Dr Paul Michelon - 42023 St-Etienne Cedex 2 - FRANCE
Tel: 04.77.48.50.62 Fax: 04.77.48.50.69