When I try to summon WitherSkull (/summon WitherSkull ~ ~ ~), then it says: "Unable to summon object".
This affects only 1.8-pre1.
Environment
CPU: Intel Pentium Dual CPU E2220 @ 2.40 GHz
GPU: ATI Radeon X1550 512MB
RAM: 2GB
OS: Windows XP Service Pack 3
Java Version 7 Update 67
Duplicate of MC-68740 – If you have not, please use the search function in the future, to see if your bug has already been submitted.