Anyone know a rollback plugin that works with 1.4.6?

CoreProtect works

Im assuming your trying to roll back the grief that was just done on your server. No rollback plugin can do this, to my knowledge. They can only rollback what was done after the plugin is installed.

CoreProtect! Simple to use, and very efficient.

CoreProtect is the best.

I believe Core Protect works with 1.4.6 although I haven't tested it myself on 1.4.6.

http://dev.bukkit.org/server-mods/coreprotect/

Its very old but still working.. I would recommend Logblock .. Even thou HawkEye was ment as its replacement, Logblock works great on my server & there are a few awesome features like a rollback questioner and rollback on bans.
For optimal performance i would reccomend either file (sqllite) logging on a ramdisk, or mysql with InnoDB.

I tried it on latest beta build 1.4.6 3 with both pex and bperms and it worked well.

-> http://dev.bukkit.org/server-mods/logblock/

CoreProtect

BB (BigBrotehr) and Hawkeye