Oh look this update did nothing to fix the problem, what a surprise.  Last time Team Meat gets my money.

But I'd wait for the update next week and hope that will fix some issues. 

There is an update coming?  Can you link me to the source please.  Thanks.

What baffles me is the last time I booted it up a few months ago, it ran flawless, now it's unplayable. 

How does this happen? 

No those didn't do anything to help.

So here's the scoop.  I decided to start playing SMB today.  I haven't played this game in a long time, I think the last recorded time was in January, it's not that important.  The point is before that, I could run the game fine with no lag and no problems, full screen and all with no problems. 

Now I boot it up today and the performance renders the game unplayable, even in window mode.  I tried everything in the stickies and steam forums.  Nothing works.  I've fiddled with the Nvidia control panel and nothing.  I have no idea what's going on.  I can run other games like TF2, Dirt 3, Lord of the Rings online and bad company 2 fine so my laptop is more than capable of running this game.  It ran fine before they implemented the world editor update, not it doesn't.

The menus run fine, but as soon as it loads up a level, the framerate drops.

I'm on an ASUS UL80jt.
1.4ghz quadcore
geforce 310m
4gigs of RAM
Using Steam version with latest nvidia drivers.  Game is freshly installed and files are validated.