Actually, that's not correct. Since testing the 4.3 release is ultimately good for you (the community), it's more appropriate to say you needs you ...
Don't go 'I don't have time', or 'I'm no developer so I can't help' or even 'that's why we have the core team' : I'm calling on each and every one of you to spend one hour of testing over the next few weeks. Have a large latte, put on that Celine Dion CD you say you don't like, close the door, take the phone off the hook and just do it.
>>>>> Sign up here !
Imagine you find this one really important issue, and you help out so many users by reporting it ... think of the karma !