I'm running 10.9.1 mavericks right now and its ok, but I heard that its not very secure. And I want to update either to 10.9.2 or 10.9.3 but there seems to be so many issues on this board. I'm mostly worried about no wifi from sleep mode and the mail app not working properly. I really need these two to work, how wide spread are these issues ? Does anyone NOT have these two issues with either 10.9.2 or 10.9.3 ?