As soon as I wan to go to the online result browser after running the test, I get the message.

post a screenie? what browser is set as default? IE?

lower your PCI-e speed, got the same problem :)

I get this message in the analysis and comparisons tab :

Your 3DMark03 score seems to be invalid, and unfortunately the Result Analyzer cannot be displayed for this result.

Result details tab and configuration tab work however.

PCI-E is running at 100MHz which is default so I don't see why I would need to lower it?

your hitting the "submit online" button and then you get "3DMark03 score invalid" ?

yep

is this only at overclocked speeds? also at default? give as much detail as possible, then we can get in contact with FM:)

I use Win XP MCE with IE6.
It's also at default speeds.

I'm not sure MCE is supported

MCE is apparently supported in 3DMark01SE but not in 3DMark03, I find that hard to believe.