When I try to register FOP2 with the serial provided via e-mail after purchase I get this:

/usr/local/fop2/fop2_server: symbol lookup error: /tmp/par-726f6f74/cache-2ceb1d8d065a835aebbb35c6be850b7c4fcd8f3b/libssl.so.6: undefined symbol: CRYPTO_memcmp

I tried via the web interface and it crashed the fop2 daemon.

Worked now by using (as per Agustin request) :

/usr/local/fop2/fop2_server --register --rp=http

and I also changed "/etc/sysconfig/fop2" from:

OPTIONS="-d "
To
OPTIONS="-d --rp=http"