Bukkit, 1.7.10. Plugins : PermissionsEX, Essentials, EssentialsSpawn, EssentialsChat, WorldGuard, WorldEdit.
If I define a region A where player can't build (build deny OR passthrough deny AND priority 0), and in it a region B where player can build (build allow AND passthrough allow AND priority 10 with owners and members = "*all" and "*myGroup" for exemple), result : Can't build in the little region B.
I don't want players build in A but I wan't they build in B.
Nothing in log.
We tried to fixe that unsuccessfully : http://pastebin.com/Pftysq2n
Not related to essentials. Head to worldguard support.