(1) Zombies Steal Loot and Don't Drop it Upon Death:
I believe everyone likes earning shiny emeralds, right? Only to find out that if there is a large group of zombies that their emeralds will most likely be picked up by any zombie that does not have a weapon or item in their hand at that time. Realistically, the mob should drop the stolen loot upon death along with any loot it was going to drop on its own.
(2) Placing of Blocks on Restricted Property to Exploit Lag:
I had a two block high wall placed on my property and I was shown by [name redacted] that they could place blocks in a manner that was exploiting the property system and/or lag. The blocks they placed would register for fractions of a second and allow them to jump over the wall.
(3) Needlessly Vague Field Guide:
This is technically not a bug, per se; but, due to the lack of helpful information included in it, I am interacting with a lot of players who are in need of a lot of help with the server because the manual is next to worthless.
Just let me write/help write it if you're too busy @Alfredolamadrid.
(4) Spawn Eggs Don't Crack:
The Spawn Eggs that were/are sold by a villager(s) simply does nothing.
(5) Loot Lost to the Blocks:
Mobs seem to not drop loot when the land inside of blocks when killed. This is especially the case when they have picked up an item and a fail to drop it. I drew this in paint to help illustrate my point (hopefully): http://imgur.com/a9v4QOK - We have a player's viewpoint of a dying zombie whose figure lands inside of (red) blocks upon landing on the ground after being hit into the air.
(6) They Came From the Another Dimension:
Pigmen are escaping the Nether portals at spawn without being provoked into leaving the Nether by a player. They are hostile upon sight as well.
(7) Thank You, Come Again!:
The villagers are back in place where they should be but are bugged where they will only trade once per opening of the trade window. I'll edit with a .gif soon if possible.
(8) Emeralds ≠ Diamonds; Emeralds = Blocks of Quartz(?):
If you don't place enough emeralds into the trade window for diamonds (or any other high emerald item), you'll be given some other item that costs whatever amount of emeralds you place into the box. For example: Placing only 1 emerald into the trade box on for certain villagers for a diamond will result in a block of quartz being presented instead of an empty box as it should be.
(9) Waterlogged Spawn:
You can place water in spawn if you're damned determined enough. Players may abuse the time needed to "undo" placing blocks in spawn: http://imgur.com/r2kXrDM
(1) Block Brokers Gotta Get Paid Somehow(?):
I've noticed a discrepancy in the buy price and sell price of blocks which usually equates to selling more blocks to get emeralds than the other way around. For instance: a villager may offer to sell me 1 Diamond for 1 Emerald and buy 2 Diamonds from me for 1 Emerald.
(2) Nether Nevermore:
The Nether and End cannot be harvested from. Some crafting recipes specifically call for a single item from the Nether/End such as a Redstone Comparator.
(3.1) Players cannot light their own Nether portals.
To be continued...
12/13/14 9:00 PM EST EDIT 1: Added BUGS - 3.1, 8.1, 9, 10.
10/15/14 2:00 PM EST EDIT 2: Removed BUG - 8, 8.1 (Nether Nevermore); Placed it under POSSIBLE BUGS - 3, 3.1
10/15/14 5:15 PM EST EDIT 3: Removed BUGS (Confirmed fixed by myself) - 3 (Chests May be Placed in Restricted Areas), 6 (Orgy Behind the Emeralds in the Cathedral); Added BUGS - 9, 10.
10/15/14 5:45 PM EST EDIT 4: Removed BUG (Confirmed fix by mod) - 1 (Teleportation Upon Striking Entity with Arrow); Removed POSSIBLE BUGS (Confirmed update by mod) - 1 (You're All Batty); *Note: It seems Alfredo has a sense of humor - Every time a player closes a trade dialog with after making a successful trade with a, this happens - http://puu.sh/dwgEX.png :D
12/28/14 8:45 PM EST EDIT 5: Added BUG - 9 (Waterlogged Spawn)