Problems with ACL and some prefixes

[Piotr Teodorowski]

Hey,

I've noticed some problems with ACL's (which doesn't work for me for most 
subnet prefixes)

my config:
acl prd {
    "192.168.0.0"/22;
    ! "192.168.1.110";
}

varnishlog -i VCL_acl,ReqStart
   12 ReqStart     c 192.168.0.12 48855 1353135783
   12 VCL_acl      c MATCH prd 192.168.0.0/22
   12 ReqStart     c 192.168.1.91 52266 1353135784
   12 VCL_acl      c NO_MATCH prd

acl prd works only for subnet 192.168.0.0/24 not /22

if I change my configuration to
acl prd {
    "192.168.0.0"/24;
    "192.168.1.0"/24;
    "192.168.2.0"/24;
    "192.168.3.0"/24;
    ! "192.168.1.110";
}
it seems to work fine (also it works, if I use prefix /16).

I've varnish from debian squeeze:
varnishd -V
varnishd (varnish-2.1.2 SVN b8c9904)
Copyright (c) 2006-2009 Linpro AS / Verdens Gang AS

Am I doing something wrong?

Piotr Teodorowski