Wyse T50 clipboard problem

Hi,

We have several types of Wyse clients logging in on a Windows 2008 R2 SP1 terminal server.
Our latest Wyse T50 client is crashing when a logged-in user is trying to copy and paste within the terminal session. The RDP session is suddenly closed and the user must restart the RDP connection to continue working again. When the user is doing CTRL+C then the session is closed again.
I have tried the wlx.ini setting "RdpClipBoard=no" but that does not change anything.

Does anybody know how to fix this issue?

Wyse enhanced unbuntu linux T50 client
Build: 20110511-0_u-1.010
Unbuntu: 10.04.1 LTS
OS Version: 2.6.32-212-hedley
Bios: W7.0_213-EC_PVT0.1

Kind regards,
Rene.