connection string bug? Big Problem.

What the heck is going on?

I have several connection strings in my project.

When I change one of them, they are all changed to the same value!

Sometimes, if I change one connection string in the Settings tab of the
Project Properties page and then close the properties, I get the following
message when I open the properties again:

Value of setting 'connstring' was changed in the app.config file
The current value in the .settings file is ------
The new value in the app.config file is -----
Do you want to update the value in the .settings file?

I get the message for each of the other connection string entries.

This is a big problem.

This is a VS 2008, vb.net windows forms project.