Miranda: zlib.dll missing?

Installed the latest, 0.7.1 by extracting with 7zip and replacing respective files except for mirandaboot.ini (which already has my relative profile directory). After this, I am getting

"This application has failed to start because zlib.dll was not found. Re-installing the application may fix this problem."

Putting zlib.dll 1.2.3 inside the Miranda exe directory allows the program to start, but it bails out immediately. Not having zlib.dll allows Miranda to start with error messages, but without Avatar and Gtalk/Jabber support.

What am I doing wrong?