Why are you flashing an old nightly, and not the one from yesterday? http://download.cyanogenmod.org/?dev...w&type=nightly
I think your issue is that your trying to flash an older nightly with a newer recovery. The newer recoveries have updated binaries that older roms arent compatie with. So either flash a newer nightly, or and older recovery.
If you want a stable rom, i would not use cm11, i would go with cm10.2.