[nsp] "GRE Adjacency fixup"?

[Ed Ravin]

I tried out "debug tunnel" the other day and saw lots and lots of these
messages:

 *Oct 26 02:15:30 EST: Tunnel4: GRE adjacency fixup, 192.168.1.146->10.0.19.30, tos=0x0

The two IP addresses are the tunnel source and tunnel destination,
respectively.  Anybody out there know what this means?  Searching at
Cisco's site or in Google did not turn up anything.

Also, is there any difference between these statements in the tunnel
config:

  tunnel source Hssi2/0/1

 or

  tunnel source 192.168.1.146

If 192.168.1.146 is the IP on Hssi2/0/1?