I'm not clear on where you are encountering "Enter Time Machine"? To enter Time Machine you just need to left click once on the Time Machine icon in the Applications folder. That will take to to the "outer space" view containing your backed up files in many receding-in-the-distance windows.
Hope this helps
Hi - thanks for the reply. As you've described, I should be able to enter the "outer space" view by clicking the Time Machine icon either within the Applications Folder or the icon in the Dock.
Neither takes me to the "outer space" view. This change occurred yesterday, up till then I've had no problems...
It's a mystery. In fact, if I could get there I could probably back up Time Machine!
OK - this is solved.
I followed the instructions from the right hand column under "Re: I cannot enter time machine when I press the icon to enter time machine".
Basically it was some sort of disply glitch. Unplugging the Cinema Display and restarting the computer allowed the system to enter the "outer space" view again.
Plugging in the Cinema Display again hasn't recreated the problem.
Thanks for helping out.