Bukkit

• Can now check offline players, will attempt to match against online players first.
• Fixed a few sql memory leaks (would open connections and not close them)
• Major improvements to performance, uses much less queries to get jobs done.
• Code overhaul
• New SQL class using jdbc compared to old class
• Now has automatic update checking (Can be disabled in config)
• Metrics updated
• SQL table now uses usernames as a unique key, fixes any potential errors with multiple playtimes and helps to reduce amount of queries needed.

None so far, but to be certain delete your old configuration so the plugin may generate a fresh one!