Howdy Apple Support.
No, the Numbers didn't crash straight away, it was while working on a document that it would crash. However, I did have an older version of Numbers (iWorks 09) sitting on my menu bar at the same time. So I have trashed that version and now work with the latest version of numbers. This seems to have done the trick (touch wood). The problem could have been that I was using the older version, or flipping between the two, without knowing about it, thus creating software conflicts or whatever.
There is one thing that u could help me with about this newer version. Everytime I create a new document " .numbers" appears on the end of the string thus wasting a lot of screen space within the pane. Any ideas how I can remove this or stop it appearing?
Cheers
Mark