Sleep light acting odd, sleep not waking up

In the past few days, occasionally I'll close my display, and then when I open it, the screen will be black, and I'll have to hold down the power button to restart the computer. The sleep button will be off too. Now, my sleep button is off when I'm running the computer, and turns on when I close the lid (and then the computer won't start). What's going on?

My MBP is having similar issues. When I close the lid and it supposedly goes to sleep, sometimes it will take up to a minute (60 sec) to wake up when I re-open it, and sometimes not at all. Also, on times that it actually wakes up, I get the "unlock" window and after typing in my password, the screen goes black but I can still see the mouse pointer only. Everything is running fine in the background (can hear Adium sound effects from connecting, etc), but the screen stays black except for a mouse pointer (which I can manipulate using the mouse pad, but is worthless since I can't see anything to click on). All I can do is shut the lid, go back to sleep, and re-open and log back in again. All this sleep/wake/sleep/wake makes me think that the more I do that, the less stable it gets.
I also have the sleep button off when the computer is on, sleep button on when lid closed issue. It is the same sort of thing.
However, I have four separate power adapters since I take my MBP to an office plus 2 home locations.

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