CraftBukkit 1.5.2-R1.0 is now available
A new CraftBukkit Recommended Build (1.5.2-R1.0) that provides Minecraft 1.5.2 compatibility is now available.
Will plugins break with this build?
Provided the developers of the plugins you are using are keeping up with the development of Bukkit, all your plugins should work fine.
For more detailed information on what is contained in this update, please see the changelog here.