[AndroidCentralSean]

I was playing around with the multiple users interface of Jelly Bean 4.2. When I tried to load Google Talk, I got an error stating that only the owner can use this app. Has anyone else noticed any other issues with having multiple users on a Nexus 7 or Nexus 10?

Sent from my Nexus 7 using Android Central Forums

[Unicorn Rancher]

Not yet but I'm a little disturbed guest users can do things that affect the owner account, like changing wifi settings or authorizing changes to apps installed by the owner.

[MJKearney]

Not yet but I'm a little disturbed guest users can do things that affect the owner account, like changing wifi settings or authorizing changes to apps installed by the owner.

I'm sure that future versions of Android will get more sophisticated with multi user settings and security, just as Windows did over the years. This is only version 1 for multiple users.

To the OP, did you log out of Google Talk before switching users? If it's still logged in under one user, perhaps it disallows a second user from logging in on the same device.