Good you asked this query on the basket order, it reminded me my query which I forgot to ask.
Dear Zerodha, have you made any change to CO as well? Asking 'cos CO was not working with some stocks today. It did not work y'day with one stock also I think, but I moved on thinking it a one-off case. It was giving something like this error: "first leg of order...rejected", though I always put the number of shares after diligently checking it with your margin tool on your website. I thought I'm making some mistake, so I tried reducing the number of shares & trigger limit but it did not work out. I think this was happening with Naukri and DB corp stocks...not exactly sure abt the names tho'!