I have just received a new Curve from O2 UK with OS v184.108.40.206 (Platform 220.127.116.11) & have sucessfully used BBScreenShooter 1.50c to take a screengrab from the Curve.
BBScreenStream 0.87b works too!
Updated: I've obtained the OS update from O2 UK but I had to email them to ask where I could get it from. They gave me details of their FTP site and they gave me a password specific to the company I work for. I was able to use this OS update executable to upgrade my Curve to OS v18.104.22.168 (Platform 22.214.171.124)