MS Word changes format after save?

Hey, me again. This has really thrown me for a loop so I'm hoping one of the MS Word gods might know what's going on. Ok, here's the deal:

I create a document in Word 2010 and save it as .doc. My coworker then opens it up in Word 2003 and alters it, also saving it as .doc. Finally, my boss opens the document in Word 2007 to proof it, again, saving as .doc.

The problem is, if my boss makes any alterations to the document, the formatting goes to hell after she saves. If she doesn't touch anything in the document, everything stays fine.

However, when she does alter something, the font will change style, size, lose its bold formatting, etc...

I set the default font on every single document. I then went through and set styles for each part of the document, making sure each style for formatted correctly.

This is only happening on my boss' computer and only on certain groups of documents. (We have documents for client A, different documents for client B, etc.. All of them created by me, all go through the above mentioned process, yet this only happens on the documents for client B and only on my boss' computer)

We tried checking to make sure her default font settings were correct, they were. Her advanced word settings also seem to mirror other computers that do not have this problem. We tried embedding fonts when saving, no luck.

I have no idea what the hell is going on. Any suggestions?

 

EDIT: Also possibly pertinent information: My coworker using Word 2003 sometimes uses auto-text to insert text into the document. We tried checking to make sure the font on the auto-text was correct, which it was.

 

I think I would start by showing all formatting marks and enabling track changes before your boss makes any changes and then review what changes have appeared when you reopen the document on your computer.

My initial suspicions are differences in the Normal.dot templates on the two computers and possibly an update or two that have been installed on one computer and not another.

Unfortunately, my copy of Word 2003 is on an older system that is halfway through being rebuilt into a mini-tower with a different motherboard. I'm stuck with 2007 for the time being.

 

This might or might not help.

I used Word 2003 for years but my PC crashed so I now have Word 2010. When I save a document, it asks me which type of file I'd like to use. Word 2003 is one option. It should be similar on 7, I think.

I hope it helps. Good luck.