Cons:
- rare DoS vulnerability
- rare bugs causing application to hang
- longer initial blockchain download
Don't forget the
very easy netsplit exploit and who knows how many other unnoted vulnerabilities due to non-maintenance...
Using 0.4.1 right now but it sucks, it forces to add tx fee when sending new coins.
So don't send new coins? Why use 0.4.1 instead of 0.4.7 or 0.4.8rc4?
Tx fee are bad when you are playing satoshi dice.
Well, that's your own fault for participating in a DDoS against Bitcoin.