Hello! Today I have two bugs that I have found using 1.8 (just officially released) First of all, many of you know that Mojang has patched the "Stackable Items" bug in 1.8. This may annoy you guys. Nope. It's still there. Instead of "/give <player name> <unstackable tool> 64", its now "/give <player name> <unstackable tool> 64 1". Yep, just add a 1. Examples:

/give @p diamond_pickaxe 64 1
/give @p flint_and_steel 64 1

If you try to throw a fishing rod stack, you can only throw 1 at a time, so it can only damage 1 fishing rod at a time, and then once that one fishing rod is broken, you have 63 other fishing rods that have no damage. (tested).
Also, this does not work with non-tool items, like lava buckets.

When testing this with minecarts, I found something weird.

I tried "/give @p minecart 64 1", and there was a pink and black checkerboard block (block, not item), and when I looked in F5 mode while holding it, I saw that the pink and black checkerboard block was HUGE in my hand.

I also thought it would work with boats, too. I tried it, and sure enough, it did.

I hoped this helped you, and feel free to lry the bugs out!