Bukkit

What steps will reproduce the problem?
1. Put item into Ender chest in one world (W1) in gamemode 0
2. /mv tp to another world (W2 (in another group)
3.Change your gamemode to 1, 2 or 3 in W2
4. /mv tp back to original W1.

Ender chest should stay as it was in gamemode 0 in W1. But Ender chest is overwritten with contents of gamemode 0 enderchest of W2 you teleported from.

What version of the product are you using?
MultiInv3-47.jar

Do you have an error log of what happened?
No

What are your world folder names (with proper capitalization)?
ASM <-W1 from example
ASM_nether
ASM_the_end
UHC <-W2 from example
UHC_nether

What is the contents of your config.yml
useSQL: true
splitHealth: true
splitHunger: true
controlGamemode: true
separateGamemodeInventories: true
creativeGroups:
- creative
sql:
host: *hiddden*
port: '3306'
username: *
password: *hiddden*
database: *hiddden*
prefix: multiinv_

SaveInventoryOnQuit: true
compatibilityMode: true
xpfix: true

groups.yml?
default:
- ASM_nether
- ASM_the_end
- ASM
uhcgame:
- UHC_nether
- UHC
old:
- OLD

What is the entire list of plugins on your server ?
Plugins (18): TuxTwoLib, MultiInv, PlugMan, WorldEdit, MOTD, OpenInv, Vault, ClearLag, PermissionsEx, Multiverse-Core, FirstJoinPlus, Prism, WelcomeTitle, Multiverse-TeleportFilter, dynmap, CraftIRC, Multiverse-NetherPortals, MineverseChat