LinuxQuestions.org - Can't run apps in Xnest

When I try to run Xnest, I get this error:

Code:

Couldn't get keyboard

then when I try to run an app (such as xterm) in Xnest, I get this error:

Code:

X Error of failed request:  BadAlloc (insufficient resources for operation)

  Major opcode of failed request:  45 (X_OpenFont)

  Serial number of failed request:  61

  Current serial number in output stream:  62

What's going on?

I'm on Ubuntu Edgy if that helps.