Thank you all for testing our latest update. It looks like we got rid of a lot of bugs and now everyone can enjoy Redstone. This is of course just the first phase of implementing Redstone, so there is still a long way ahead of us. If you find any new bugs that have not been reported to the bug tracker yet, make sure to do that. If it is not reported - we will not be able to fix it :D
Check the links on this blog to learn where and how to report bugs.
The official changelog and latest information can be always found on our official Mojang blog.
Don't forget to check out the downloadable Redstone Mansion map showcasing the newly implemented redstone features in 0.13 at redstone.minecraft.net.