Very simple issue, seems that has been forgotten in this case. One of us in the developer team had the great idea to name a table "group". So we need quoting And adding a index on this table within a migration was not possible because the table name doesn't get quoted when adding an index..
So I added the tiny patch necessary to correct this.. I know it's not impressing but it's a fix Maybe it gets in the maintenance release 1.1.5 before the 2.0 stable comes out (if there is anything more in the 1.1.* line)..