Affects Version/s: Minecraft 14w27b
Fix Version/s: None
Environment:Vanilla 14w27b, Ubuntu 14.04 Linux, Java OpenJDK 1.7 latest release. Radeon graphics card, the automatic open source graphics drivers. If you want more information, let me know specifics
What is it:
When you place powered rails (p), detector rails (d), normal rails (r) and whatever block (b) like this:
and place a minecart anywhere, and push it. The rails will start randomly flipping directions from the normal angle to a slant up in the middle.
I have an example (and it's obvious how you do it) right there:
I'm sorry if this is a clone, I did scan through the "Rail Bug" serarch in the bug tracker.