[OE-core] Problem with QTcreator and meta-toolchain-qte

[Marco]

Host development machine
- Ubuntu 12.04 (native and into In WmWare virtual machine)

OE/Yocto version
- Yocto Dylan 1.4 (and master)

Machine
- imx53-qsb (and at91sam9263)

After setting /opt/poky/1.4/environment-setup-arm......
I can successfully make the Qt/e app in console mode, but...

1. Launching compilation into QTcreator I get this final message

  http://pastebin.com/NVWCb4yq

2. Moreover if I enter a wrong command I get this message instead of the 
usual Ubuntu error message "Command not found"

  http://pastebin.com/QLcZWFxc

Any hint would be greatly appreciated
TIA
-- 
Marco