This probably isn't the place to ask for help on this subject. Try: http://spigotmc.org OR http://bukkit.org
I've tried searching through there, but to no avail. If no one can help me here by tonight I will go back there.
Have you recompiled your plugins using the 1.7.2 Ro.3 release? If not, that's probably what is going wrong. Try that and if it doesn't work, then ask on the Spigot forums, bukkit ones are useless.
1.7.2 R0.4 seems to be breaking a lot of plugins (at least for me) i'm not sure about .3 ...but i'm about to revert back to .2 because everything was fine when I used R0.2 But make sure your java is up to date mainly ... and if that's not the case it's most likely your configuration has spelling or spacing wrong (try using notepad ++ it helps aligning things easier)