This is definitely sunburn, and makes sense given the background info you provided. Most of those leaves will probably continue to shrivel and ultimately fall off; it may give your plant an odd appearance for a while, but it's not life-threatening. I have many plants in full sun; it just requires nice, slow acclimation.

The thing I'm concerned about in your photo is the center of your plant; it almost looks black. It may just be shadow, but if it is discoloration, it looks like rot radiating from the center. That would be a much bigger issue than sunburn.

Hm did it rain during the days you left it out? This could be a bit of sunburn and a bit of rot problem.. But I could be wrong, are the leaves soft and mushy? Make re you don't water it at all for now. The centre of the plant is the key, check and see if the new leaves inside look healthy

This post was edited by DavidL.ca on Wed, Jul 9, 14 at 0:23

No rain, and the center's fine, its just a shadow from how the picture was taken. The center leaves are firm and healthy, besides a bit of sunburn on a few. Anyway, thanks for the help, I appreciate it!

If you still have healthy leaves in the center (growing point), then maybe there's hope for your plant making it. Fingers crossed for you!