I have had some Google searches go to Microsoft's MSDN Troubleshooting and Support website. http://msdn.microsoft.com/en-us/aa570318.aspx
This seems to happen with the search bar at the top (which is set to google) as well as Google.com. I have had redirect issues before but this issue doesn't look that that at all.
Example: I typed in emoticon in Google and http://msdn.microsoft.com/en-us/aa570318.aspx
shows up. This happens with a few other searches as well.
Another example: I typed in red black component wire and the same page comes up.
It looks like it's only Firefox that does it but I will experiment more. Is there a setting that could be out of place in Firefox?