What steps will reproduce the problem?
1. in cmd create symlink: mklink "c:/target" "c:/source"
2. in vim: echo resolve("c:/target");

What is the expected output? What do you see instead?
I expect "c:/source" in output, because "c:/target" is pointed to "c:/source", 
but get "c:/target" instead.

What version of the product are you using? On what operating system?
Latest vim 7.3.1280
Windows8