Seeing as andrew implemented the Repair McMMO skill, /repair now brings up the McMMO function, rather than the Ext Commands function of /repair.
Had this problem elsewhere.. I figured it would happen here, but I didn't even remember until you made this thread. ._. All /repair commands for ExtCommands do nothing now.
Also mcmmo repair is not actually enabled fully because no one can repair that I have heard so far, I know I tried using mcmmo repair and it did not work, although it did let me know when I placed an iron block that it was an anvil for repairing now, which is different from before. Could be who gets to use it has not been set yet I imagine. Alaskan said you are able to change the ext commands name of repair so that there is not a conflict, I hope that is the case.