Error with tcp/ip networking

I'm getting:

FATAL: StreamServerPort: bind() failed: Address already in use
        Is another postmaster already running on that port?
        If not, wait a few seconds and retry.

when I use postmaster with the -i option.  Yes, I already deleted the
/tmp/?????.5432 files.  When I run postmaster without -i, it works fine, but
no tcp/ip access.  I had it working with tcp/ip once, but I had a nasty
crash for other reasons, and postmaster did not get a chance to exit
normally.

What did I miss?  I'm running it on a solaris workstation.

Travis Bauer