Hi there,
Thanks for your awesome library which is working like a charm on my local Mac.

However, I need to port it to ubuntu but when I run the shot() function I get the following error :
(It's is through VNC, running vnc4server)

X Error of failed request:  BadRequest (invalid request code or no such operation)
  Major opcode of failed request:  149 (RANDR)
  Minor opcode of failed request:  8 (RRGetScreenResources)
  Serial number of failed request:  11
  Current serial number in output stream:  11

Any clue about where it's coming from?

Thanks!