apt upgrade has "unresolvable dependencies"

["Edward C. Jones" <edcjones@comcast.net>]

I am using Debian sid on a 386 architecture. I tried to upgrade apt 
0.5.28.1 to 0.5.28.2 using synaptic. I get a message about unresolvable 
dependencies:

apt:
 Depends: libgcc1 >= 1:4.0 but 1:3.4.3-9 is to be installed

My system already has libgcc1 1:3.4.3-9 installed. I am new at Debian so 
I ask naively: What does one do in situations like this?