Asukalution

Launcher/pack Version: 1.0.1.3 Launcher, 2.1.0 Client, 2.1.1 Server Operating System: Windows 7 Version of Java: JRE7 x64 Description of Problem: When playing on my server, I sometime run into a bug where items cannot stack on top of each other. So far, I've run into this problem with Rubber, Glass, Cobblestone, Seed (Wheat), Wheat, Insulated Copper Wire.. the list keeps going. Also, I think related to the same bug, when I place down a block (an example; Low-Voltage Solar Array) the block simply disappears, and I receive the items that I used back into my inventory (no longer a Low-Voltage Solar Array, but 8 solar arrays, 3 copper bars, 2 ins. copper wires and 4 wooden planks). Without deleting the world (my friends have no problems, only me), I deleted my player's dat file from the server, disabled NEI, removed InvTweaks from Tekkit.. and the bug is still continuing. Other Info: Server is ran on my computer, I connect to the server using localhost. I even tried connecting using my own IP address. The server is given 3GB of ram to run. Error Messages: N/A Log