It appears that the script for registering a vote online is not compatible with firefox (?)
Triage I can confirm that. When I tired to vote using Firefox there were no voting options but there was a submit button. I'm not sure what the default voting option is (if any) so it you used Firefox to vote it's possible your vote will be recorded as "For" no matter what you voted. There is a confirmation email with your vote shown but if you don't read it you won't catch any voting error.
I think most voters will catch the error though. I changed to Internet Explorer for voting and had no problems.
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