I have an S3 with a rooted stock ROM and I started toying with changing the standard boot animation. I used the process at Homemade Bootanimations Collection + How To Install/make + Enable/Disable - xda-developers with success. I downloaded several animations with ROM Toolbox and everything worked fine. I then modified one and it worked as well. I modified another but did not keep an eye on the final size of the zip file and I noticed later it was much too large. It locked my phone up at the start of the animation sequence and I had to flash the disable zip file. After flashing the enable zip file I noticed that it would not accept any modified or custom bootanimation files including the one that had previously worked. Stock ones downloaded through ROM Toolbox still work. I have gone over the files thoroughly but don't see any problems. I have tried something as simple as extracting and repacking a stock animation to a NANDROID restore with no success. I have also placed it manually in the /data/local folder with no success either. Does anyone have a clue what may be going on?