Can't wake up after sleep mode

Question

Mac owner for 2 months now and have had no problems till today...had to reboot to wake up from sleep mode...one time occurrence or start of an issue?

Answer 1

That's an important one.  Let it finish normally until you are fully rebooted and things are stable. 
Whenever I get a firmware update like that one, I follow nine steps to ensure my computer is in top shape. Basically, they represent checking the disk for errors, fixing the errors, fixing the permissions, and setting the default memory values to whatever was in the firmware.
1) shutdown the computer
2) push the power buttom and as soon as you hear the chime, hold the option key and don't let go
3) when you see your boot options, let go of the key and select recovery partition (Lion only)
4) select disk utility from the options, then highlight Macintosh HD, do a repair the disk and repair permissions
5) now click the apple icon in the upper corner and shutdown
6) pull the power cord and hold the on button for 15 seconds
7) plug it back in, and find the option, P, command, & R keys
8) hit the power button and as soon as you hear the chime, hold all four keys (it takes two hands)
9) wait until you hear the startup chime twice and let go, allow the computer to finish booting
I'm not recommending you do it, it is just what I do.  Good luck.