I can't tell if you're floating or not, I am assuming you aren't. Was your world a clean world from TekkitLite, or did it come from tekkitClassic? Just wondering.
--Hopefully you backed up your world. Did you?
I will continue to look through the mods, but it seems that when it says this
2013-01-16 21:12:56 [sEVERE] [ForgeModLoader] This world was saved with mod IC2 which appears to be missing, things may not work well
Things may not work well. I wonder if Tekkitlite updated their server but went under the same name? I don't have this issue and to fix these problems locally with friends I send them my server files.
I guess try loading a new world (Make sure to back up )and see if the marble is still there, or the logs look the same.