We are also having this error in Excel 2007. After it came up, the
document formatting was all lost.

The documents are big, but full of words, numbers and formatting. No
forms or programming.

Person it happened to is on a Sony running Vista and Excel 2007. The
computer connects to Windows Update so it should be up to date. Norton
360 us also protecting the machine.

WIth multiple setups like this, the only difference I can see off hand
is the brand of computer.

Thoughts?
Help?