git: symbol lookup error: git: undefined symbol: deflateBound

Hello,

I have compiled and installed the latest version of git from source.
When I try to add a file to my repository I get this error:
git: symbol lookup error: git: undefined symbol: deflateBound

The second time I try to run the command git outputs this warning:
fatal: unable to create '.git/index.lock': File exists

Hmmm I am really lost. Tried different versions with the same result.
The strange thing is that I used git some month ago without any
problems. Could there be some old conflicting files on my system?
Maybe from a older version of git?

root@server [/home/test]# git-init
Initialized empty Git repository in /home/test/.git/
root@server [/home/test]# git add .
git: symbol lookup error: git: undefined symbol: deflateBound
root@server [/home/test]#

Best regards.
Asbjørn Morell.