Last Friday I did some work on a big PPT presentation. Incase it's important,
the file size was ~20 MB with 57 slides. The file size is high due to alot of
full-size images being used.

Today (Monday), I opened up the PPT to continue working on it. To my
surprise, *ALL* of the images are extremely dark! I can still make out some
detail, but it's like they're 80-90% near black.

The odd thing is that it's *only* the images that are this dark. I have some
normal text bullet slides, with a colored template/master slide being used.
Those are at the proper brightness/appearance.

However, some of those bullet slides also have thumbnail images to go along
with them. *Those* images are also extremely dark.

Any idea what's going on? :-(