Bukkit

PLEASE FILL OUT ALL THE INFORMATION BELOW! IF YOU DON'T DON'T EXPECT IT TO GET FIXED!

What steps will reproduce the problem?
1. Have item (or item stack) in inventory you want to glitch
2. switch to world with different inventory
3. switch back to the initial world "WHILE" spamming the DROP button
(you have to hit the /warp world command or click a warp sign drop key at the same time basically and spam the drop key super fast)
4. the world loads with 2 stacks of items on the ground

What is the expected output? What do you see instead? To not dupe/glitch items, or perhaps some sort of 1-2 second delay so the it makes sure the World is 100% loaded before it drops items from inventories?

Have you tried the latest version of MultiInv from http://build.yu8.me:8080/job/MultiInv3/ (If not please try it to see if it solves your issues)?
Yes using the latest build

You can either fill out the information below or use the plugin DebugReport to generate a report:
http://dev.bukkit.org/bukkit-plugins/debugreport/ There are no bug errors

What version of the product are you using (if you say "latest" you will NOT be helped)?
multiinv MultiInv-3.3.6.build 70

Do you have an error log of what happened? no log

What are your world folder names (with proper capitalization)? This don't matter works form any world with a different inveotnry

What is the contents of your config.yml and groups.yml? default config

What is the entire list of plugins on your server (doing /plugins on the console and pasting the output is a quick method to do this)? Here is timing report with list of plugins: http://www.spigotmc.org/go/timings?url=14380882

Please provide any additional information below.
Let me know what other information you might need to check this out... or I can get on your test serer and try to show you? just let me know my skype name is: AdminZero - Ecoworld Minecraft

Thanks.