MS Word spelling problems?

About half-way through a document, the spelling dictionary goes wacky.

All of a sudden, it doesn't know words like "seed" and "oil" (though it did offer a spelling suggestion of "oil" with an umlaut over the i). If I type "seed" in the first half of the doc, it's fine. If I type it (carefully, no typos!) later in the doc, it gets a red squigly.

WTH?

Linux and Power Point

We're getting some new equipment here, and the manufacturer produces the software to run the equipment for Linux operating system. Everything else here is Windows based.

How difficult is it to get images/text from a Linux system to a Windows system? Is it as easy as saving a .jpg and mailing it to yourself? If the Linux system is not on a network, are there cross-platform thumb-drives? What about compatibility between Power Point and the Linux equivalent?

Any info or links will be appreciated!

Thanks!