Doing some consultancy work right now, and this large enterprise-level customer still has a lot of v5 clients depoyed. Its the usual problem getting new clients deployed in an enterprise - it takes a lot of time.
So my current desktop looks like this. Its an R5 client, an R6 client and two R7 clients.
Why do I mention this ? Just the sheer horror of doing notes client based apps on R5 where half of the events either dont exist, or dont work. Its a reminder how far we've came in the last seven years..