O.k, lets put that down as "missing something glaringly obvious". I had left the $display in the 'repeat' due to something I was trying to do earlier; forgot to remove it. Change it for '1' and all is fine and dandy. Cheers :-)
I'll think a bit before I post next time.
Anyone who read my earlier post about Time::Hires, might see what I am eventually trying to achieve. I'm just writing a little stopwatch/countdown timer that doesn't eat up CPU. Was trying to get Time::Hires to help me only cycle a few times per second, rather than constantly updating the display.
Incidentally, any thoughts on that would be appreciated.