Prevent Hibernation?

Hello.

After installing the Macbook Pro 2.0 update not too long ago, my computer after a prolonged sleep will go from sleeping to hibernating. When I open the lid I get the white progress bar at the bottom and my computer is unusable for about 2 mins. This has only started happening since the update and never happened before. I've tried changing hibernatemode in terminal to 0 but to no avail. Has anyone else had this problem since the update?