Bukkit

This plugin works well for us except for 1 big problem. there is a good chance of being teleported to a location with nothing under us. I am setting up a Project Ozone 2 server using the SkyLands world generation so the overworld is basically a bunch of floating islands all over. Sometimes we land on one of the islands, sometimes we are teleported over the void and fall to our death. 

Is it possible to whitelist the blocks it can put you on? I saw blocks can be blacklisted (I believe Cactus is by default) but if I could whitelist so it only lands a player on dirt, grass, or sand, that would be great.

Also, a side note for something as well. Is it possible to have the plugin look for and respect GriefPrevention Claims so it does not teleport someone into someone elses claim?

I use this on our modded survival server and really like it so i'm hoping we can use it on the Ozone server too!!

I think my main issue (spawning over the void) was fixed by me adding AIR to the blacklist. I've done about 50 /RTPs since the change and so far, not a single void teleport whereas before it was about 1 out of every 10 or so that was dropping us over the void. Not 100% sure if this actually fixed it or not yet as I may just be getting lucky with the teleports but hopefully. If I have any more void teleports, I'll post back on here. 

So this now just leaves my concern with teleporting into someones claim in GriefPrevention. I don't know if that is something that is fixable or not, but hopefully so.