[Projoy] You're thinking of biannual, surely? I must admit to not being entirely sure of the meaning of "perennial", now I come to think of it. It's one of those words that one uses without really thinking about it. I think it means persisting from year to year, or possibly appearing at least once a year. Perhaps.
oooh - that looks a bit schoolmarmish. Sorry. Anyway, to get away from the semantics, I'd like to announce that for a change I stayed in tonight and watched loads of crap TV and REALLY enjoyed it.