FATAL: Ipc::Mem::Segment::create failed to shm_open(/squid-squid-page-pool.shm): (13) Permission denied

[Will Roberts <ironwill42@xxxxxxxxx>]

Hi,

I'm trying to use Squid 3.2.0.14, but whenever I run squid it exits 
after only printing:

FATAL: Ipc::Mem::Segment::create failed to 
shm_open(/squid-squid-page-pool.shm): (13) Permission denied

For the moment I've switched HAVE_SHM to 0 so I can continue testing, 
but what does the error above mean? Is it an issue with my config? 
Directory permissions somewhere?

I'm running on Debian Squeeze x64, let me know if there's any library 
information that would help.

Thanks,
--Will