Sorry, but I did do a search. It's difficult to find duplicates when people word things differently and use different phrases and stuff. I also figured out i had the particles on minimal.
I'm having this problem, but only when it's a single bucket. When I milk a cow with stack of two or more buckets, I get a milk bucket.
That's odd... Before I don't remember sneaking... but I must have been because for some reason now it's not placing. I had to have been using shift.
It's my own texture pack, I upload the version I had played around with and edited a little bit just now for this issue. Here's the link: http://www.planetminecraft.com/texture_pack/nautilus-texture-pack-v12/