Bukkit

+ Added /sb now
+ Added /sb next
+ Added /sb add
+ Added /sb remove
+ Added variable support for prefix and suffix.
+ Added all missing variables to the boss bar.
+ Added option for boss bar to reduce the health bar (based on the delay).
+ Added spanish translation of readme.txt (thanks goes to mafuentes01).
+ Re-added ignore - support for servers with "online-mode=false".
! Changed look of "/sb list".
! Updated Updater to version 2.3.
! Fixed some spelling errors.
! Fixed bug that you weren't able to use "/sb ignore me" on servers which are running with Minecraft 1.6.x and below.
! Fixed bug that the broadcast doesn't get started if "requireonlineplayers" is set to true and "checkforupdates" is set to false.
! Improved message randomizer - the same two messages now don't get broadcasted twice in a row.
! (Again) Improved code and removed unnecessary/redundant code.

-> Completely compatible with 1.8.X, 1.7.X, 1.6.X and previous builds!

There aren't any caveats. You can use this version/plugin safely.