Random damage air block, seeking solution

Hello, I have a problem on my server, somtimes in a apparantly random areas, but it seems to be only in caves one or a few air blocks in an area cause damage to the player, when i try to place a block on this location that does damage the block will not stick just vanish, the only way atm is to use world edit to fill that area, removing the blocks again result in the same though, air blocks that does player damage.

I cannot really make a bug submission, as i dont know what causes this and how to reproduce.

Have anyone had and resolved this issue? im aware it might be a plugin, but i have no error messages that can guide me in any particular direction.

1. Debian linux "Squeeze"
2. x64
3. java version "1.6.0_24"
Java(TM) SE Runtime Environment (build 1.6.0_24-b07)
Java HotSpot(TM) 64-Bit Server VM (build 19.1-b02, mixed mode)

6. java -Xincgc -Xmx4G -jar craftbukkit-0.0.1-SNAPSHOT.jar &
7. se list down
8. no errors in log
9. deactivated some plugins, updated plugins
10. no

I use Bukkit 740, mobs on, animals on, pvp off

The plugins i use are
AdminChat
DeathMessagePlugin
BigBrother 396
Essentials 2.2 EssentialsChat EssentialsProtect EssentialsSpawn, with disabled home and sethome
FalseBook *
FoundDiamonds
LWC
MCDocs
MidiBanks MusicCraft
MultiHome
NoCheat
Permissions
SignColor, SignTrader, CommandSigns
SimpleSave
Vanish
WeatherControl
WorldEdit

 

humble bump

 

Well I have the same problem on my server. Very random. If you stay in the damage area and it kills you, it says "killed by Slime" I have slimes disabled on my server (using moblimiter).
We have figured out a way using world edit to get rid of the areas.
Select a area larger than the slime damage area (2-4 blocks either side) and use the /regen command from WorldEdit.
It returns the area to its default (seed generated) state.
We were using bedrock to block off the areas until we found this.
Hope this helps!
MH

 

I will try this, thank you verry much