wrong icon of Unix symbolic link in Finder
Solution 1:
I had the same problem, and it seems the problem in LaunchService in OS X. To clear it "cache" try this command in terminal
/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -r -domain local -domain system -domain user ;
and then
killall Finder; killall Dock;
In Mavericks it should work without reboot or re-login.