Craftbukkit beta 1.6.2 server showed this error pastie.org/8249346 and I'm putting it here to remind you when you get a chance. This is with the dev build I compiled after the edit to your 1.6 commit yesterday.

Did not implement scripts yet. They do not load. Global config has no scripts list just yet.

In order from most important to least important:

Fixed Command Bug
Player Props
Gamerule
Votifier Event

Multiconfig, if it happens to be working.

During the seperation of worldGuard flags and Towny and such
If more than 1 plugin has a common flag such as PVP

use a _pvp flag set on it instead of plugin dependant.
This can also include plugin specific so you can override one or the other.

The property is inconsistent from other events within the plugin.
It is currently using custom logic to determine if it is cancelled. Some plugins are not setting the result of the event to deny to prevent it from running. They instead just cancel the event, which will just result in the event being no longer being cancelled as it passes ModDamage.

• Create properties for event results
• Make cancelled property consistent.

When using the log routine. You specify the log file name as so.
log.(name Here)

When using this. Certain values will result in unexplained errors.
Although this list is incomplete, the following will result in errors.

Task List

• Isolate location of bug
• Find any other affected keywords

Integrate world guard fully

• PVP Flag
• Potion Flags
• Region Enter Flag
• Region Exit Flag
• Explosives flags
• Add the rest of the flag list here...

http://pastie.org/9282355