Extrude drill down.

 From:  Michael Gibson
5034.4 In reply to 5034.1 
Hi Danny, I can repeat the problem over here and it looks like an unintended change in behavior from v2, I will investigate it.

For the moment for that particular thing you will need to preselect the edges you want to extrude before running the extrude command.

Thanks for reporting it!

- Michael