'at now' not working as expected

[Jeff Richards]

When I try to schedule something immediately with an 'at now' command it appears to queue up but can wait multiple minutes before actually executing.

Is there something I have missed with FreeBSD's version of at?  I've used 'at now' with AIX, Linux, and OpenBSD and it immediately executes for those systems.

I am running FreeBSD 7.0 stable.

Thanks in advance.