What does 'go version' print?
go version go1.3 linux/amd64
go version devel +f7e7857afd88 Fri Aug 01 16:45:33 2014 -0700 linux/amd64

What steps reproduce the problem?
If possible, include a link to a program on play.golang.org.

1. Run code at http://play.golang.org/p/41yjG2bL40

What happened?
Displays errors "json: cannot unmarshal number 1e2 into Go value of type
*int*" for all int types.

What should have happened instead?
No errors should be reported (and correct number should be unmarshaled).

The behaviour clearly is inline with strconv.{ParseInt,ParseUint}, but that does
arguably not agree with the JSON specification - unless int types are determined to not
be numbers.