The "Debian 5.5 Build" is now working now on RedHat ES 5.6. The "Ubuntu 10.10 Build" will not work on RedHat ES 5.6. Also, you'll need to do the following before starting up "./utserver": ln -s /lib64/libssl.so.0.9.8e /lib64/libssl.so.0.9.8 ln -s /lib64/libcrypto.so.0.9.8e /lib64/libcrypto.so.0.9.8 This is excellent. Works with the FireFox uTorrent Add-on.