Dropped items either dissapear or don't drop at all

[MinecraftPalmis]

Title: Dropped items either dissapear or don't drop at all

Version: 3.1.1

OS: Windows 7

Java Version: Java Version 1.7.0_05 from Oracle Corporation

Description of Problem:

Playing online with a friend, used to play 3.0.3, but items would sometimes not drop when we q'd them out of our inventory, checked inventory and alchemy bags for lost items, but could not find it. Thinking the world was just too large, we started over in 3.1.2 (I know i listed 3.1.1 above, but 3.1.2 was not an option). The problem went away for some time, having minor instances of it every now and then, but now it is constantly happening no matter what we try. We tried disconnecting and reconnecting, restarting the server, but in the end, nothing worked. Can't find anyone else with this problem, support would be greatly appreciated.

Error Messages:

none

Error Log:

none

[Torezu]

Do you have any plugins that cause items not to drop until other items in the chunk have been picked up or destroyed? That'll do it.

[MinecraftPalmis]

No pluggins, at one point I attempted the timber pluggin, but whoever cut down the tree would get dc'd for internal server error, but everyone else could stay in, and the whole tree fell anyways. That's beside the point, though, sorry I got off topic. The problem happened in the recommended build and the latest build (before and after timber)