Minecraft Issue

Well I was making all 8 Megaman II Master Bots and ....i get this Error while building them and tried to take screenys of the progression... Failed to save: java.lang.IllegalArgumentException: Number of remaining buffer elements is 1229760, must be at least 2174976

I have them all done I WILL Upload them but i have no screens of In prog I had to WIPE my MC file (backed my stuff up first XD) and then took a test screeny in fullscreen an it worked fine so sorry again for no progress Images please do not accuse of my Importing I made these by hand

So if any one is having this problem just BACK up your MC folder and reinstall it if you get this Failed to save: java.lang.IllegalArgumentException: Number of remaining buffer elements is 1229760, must be at least 2174976 i hope it wont reaper