Put the summary of the bug you're having here
What I expected to happen was...:
Load a world
What actually happened was...:
Minecraft Crashed
-------------------------------
How To Create Problem
1. Create a world
3. Close Minecraft (or go to Title screen)
4. Open MCEdit for 1.5.2
5. Open your created world
6 Use the Stack Entities Filter to stack anything on a Horse
7. Close MCEdit
8. Open your world in Minecraft
9. CRASH
Attachments
Comments 3
Description: Ticking entity
java.lang.ClassCastException: sr cannot be cast to oc
at rp.e(SourceFile:1174)
at oc.c(SourceFile:1310)
at od.c(SourceFile:292)
at nh.c(SourceFile:93)
at rm.c(SourceFile:32)
at rp.c(SourceFile:964)
at oc.l_(SourceFile:1165)
at od.l_(SourceFile:169)
at rp.l_(SourceFile:995)
at abr.a(SourceFile:1350)
Is this still a concern in the current Minecraft version? If so, please update the affected versions in order to best aid Mojang ensuring bugs are still valid in the latest releases/pre-releases.