Best thing that could have happened to them, they only have one objective this season.
No shame in losing Away against a very good Chesterfield team.
Also, as strange as it sounds, they almost "needed" to end their long unbeaten run. I'm sure they will use this defeat to kick on in the League.
I remember back in the Sturrock Promotion season when Argyle lost at Peterborough in the Cup and a lot of people moaned because they were below us. Looking at the bigger picture, I wasn't too unhappy.