This problem is still happening. Here are some more details.

I set it up to autosave as Excel 97-2003 and nothing changed. This
issue only occurs when saving to the local network.

When I open a new spreadsheet, I get 4-5 saves before the "Document
Not Saved" error pops up.

I can exit and then reopen excel and the same thing happens

I can still access the network once the error occurs

I am not saving anything intricate and the error even occurs with
blank XLS files

Windows XP Pro Box

In recap: I open Excel 2007, ctrl + s and save as test.xls on a
network drive as a 97-03 xls file. I hit ctrl + s again and again, and
on the 4th or 5th time (changes occasionally) I get a "Document Not
Saved" error and I cannot save the file again. I can save as another
file, but not as the same file.

Any ideas?

Thanks

-Jeff