hey folks,
thanks for reply. I think I found the problem. The key seems not to be working.
I killed terminal.plist, reset all what could be imagine. Then I read through suggested
http://support.apple.com/kb/TS1381 - no I did not use the system CD, yet - but instead of this I tried an external USB Mac keyboard with that keyboard layout application (don't know how it is called in US version) flashing keys when pressed.
When pressing Ctrl on this external keyboard the regarding <^> key on lower left does flash together with right one. If unplugging and pressing Ctrl on the MacBook Pro keyboard nothing flashes. I expect, that the keyboard has an issue. Will test things with system CD, later. But I am pretty confident that this is the problem.
Thanks again.
regards
rob*