I have CM11 on my phone right now, and I think the boot animation is pretty boring, especially compared to the one in CM10. I'm on a LG Optimus G, where the screen resolution is 1280x768. I downloaded the CM10 boot animation files, and it came with a number of versions depending on the resolution of each animation. I picked the 720p by 720p one, zipped the animation folder without compressing, copied it to system/media, fixed permissions, and deleted the previous animation. I followed the instructions I found on various forums to the letter, and yet all I get during boot is a blank black screen. The transition from the black screen to the lock screen is glitchy also, with it showing the homescreen for a few seconds, showing battery icon at -1% (??), then finally getting to the lockscreen. I tried this multiple times, and it doesn't work. I don't know why something so simple is so complicated. I attached the animation zip, also, and it looks like the xda forum uploader automatically renamed it with a  at the end. It was bootanimation.zip originally.
Help would be appreciated.